[Tutor] database app
Hey there, i have used the cgi module and dig it. heres the deal, my employer wants me to build a dynamic website that will access a database and display customer information on web. ok, easy enough. heres the trick. the database is MS Access. - ick. what could i do to manipulate data in an access database ? can it be done ? all the research i have done just points me to sql, sqlite, etc... i wouldnt mind if i can find a way to push everything from access to another kind of database, but i dont know where to start. any ideas? -thanks ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] database app
Exactly what i was looking for. thanks gents, i didn't even know this module existed. i guess this access project will not be as intimidating as i thought. cheers ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] question about comma delineated text
Hey there, i have some log files that i want to be able to work with. the lines of the log files are comma - delineated. i want to put those into a database where each piece of info (comma delineated) would be the fields of the database. ok, so the first obstacle is learning how to make a list or dictionary (prefer dictionary) out of each line of the log. any suggestions of where to start? thanks ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] how do i pause a script ?
Hey all, how do i pause a script. like print 'something' pause a half second print 'something else' any takers? ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] database app
Alan G wrote: >>>going on at a time I'd consider moving the database >>>or using snapshot technology or similar, Access locks >>>by pages (default 2K?) which can mean a lot of data >>>rows being locked by a single update. >>> >>> >>> >>ok, another question about this, if i use a snapshot, copy that >> >> >snapshot to > > >>the shared folder, i should be ok, to not lock it up for that main >> >> >app > > >>that uses this database right? the database has a .mdb extension, >> >> >ODBC > > >>provides for that right? i have been looking but not finding out if >> >> >i > > >>can copy the .mdb access database file to a windows XP shared >> >> >folder, > > >>copy that into my debian linux box and manipulate the database. >> >> > >I'm no expert but I don't think the file on its own will be enough. >You need the Access engine for the ODBC driver to work - so it needs >to be on windows. > >When I said snapshot I expected you to copy the data to a new Access >database, run the web app and alongside have a synchronisation job >running looking at the audit trails on both sides and synchronising >every 15 minutes or so. Of course that has its own locking issues >since Access doesn't really support that either, but maybe you could >copy the snapshot onto MySQL or somesuch, then at least the locking >problems are only in one direction! > >It might be worth checking MSDN to see if they recommend a solution. >I know we gave up on Access for web apps but presumably others >have grappled and found working solutions? > >Alan G. > > > > ok, i have looked and looked, and i cant find a way to use an access mdb file. yes from windows, no from linux. no way around it, i gotta be able to export access to a string of text somewhere. i think that access can export to and from excel - perhaps with the cv module i can do something with the log file. but right now, unless my research is bugged out, access is a no-go solution for linux. thanks, shawn ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] strip an email
Does anyone know how to strip everything off of an email? i have a little app that i am working on to read an email message and write the body of a message to a log file. each email this address gets is only about three to five lines long. but i cannot seem to get just the body filtered through. i get all the headers, the path, what spam-wall it went through, etc... any suggestions would be greatly appreciated . thanks ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] search through a list
hey there
i have a file that i want to read.
each line in the file is the name of a file.
the next line is how many lines are in that file.
example of loglist.txt
log1.txt
232
log2.txt
332
log3.txt
223
so log1 is a text file that has 232 lines in it.
ok, so what i want to do is read this file, see if the file i am looking
for is in it
and if so, i need to know how many lines are in the file.
here is what i have so far.
import os
#get a list of Logs in logs folder
LogFiles = os.listdir('/home/nephish/Projects/Piv_GCI/logs')
#open the loglist file and read the lines
LogList = open('home/nephish/Projects/Piv/logs/LogList.txt', 'r')
LogsRead = LogList.readlines()
#see if there is a new log file.
for i in LogFiles:
if LogFiles[i] not in LogList:
#if there is a new log, open it and read the lines
StrName=(LogFiles[i])
NewLog = open('/home/nephish/Projects/Piv_CGI/logs'+StrName,'r')
NewLogRead=NewLog.readlines()
#print the lines (testing only)
for x in NewLogRead:
print x
print '\n'
print '\n' #end for loop
else: #if the log file is not new,
um this is where i am stuck. i need search the LogList for the name of
the name of the file in LogFiles and get the line number back so i can
use it to compare with how many lines are in the log file so i can only
process the data in the new lines ... does this make sense ?
i need to find the item in a list, and when found, return the next line.
any takers?
thanks
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[Tutor] search through a list
Hey there thanks, quote: /try num_of_lines = line_find(LogsRead, "PV050614.LOG") I am binding num_of_lines to the return value. In an interactive session, without the binding, a non-None return value will display on screen. But both interactively and in a program binding it makes it easier to use later. Indeed, in a program, no binding -> no later use. /this is what worked out for me. i am trying to get as familliar as i can in idle because it lets me know as-it-happens when i have something messed up. this put my pieces together. thanks again shawn <>< ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] search through a list
Hey there, sorry to bother you again about this same problem
but i have a line of code in this same issue that works in idle
but it does not work in a regular script.
that same thing i am trying to do, reading the directory, comparing the
list of files to a list . just want to catch the newest lines of a
log file to process later.
here is what i have ( kinda long )
#!/usr/bin/python
# Update Database
import os
print ' '
print ' '
#get a list of log files in the directory
LogsInDir=os.listdir('/home/nephish/Projects/Piv_CGI/logs')
print LogsInDir #testing only, remove later
#read the contents of the log list
LogList = open('/home/nephish/Projects/Piv_CGI/LogList.txt', 'r')
LogsRead=LogList.readlines()
LogList.close()
print 'Lines of LogList.txt'
for i in LogsRead:
print i #testing only, remove later
#this function returns the number of lines on record for each log file.
def line_finder(LogsInDir, flag):
flag=flag.strip()
return_next=False
for line in LogsInDir:
if return_next:
return line.strip()
else:
if line.strip() == flag:
return_next = True
NumLogsInDir = len(LogsInDir)
NextLog = 0
while NextLog < NumLogsInDir:
print 'opening file '+LogsInDir[NextLog]
print ' '
Count_in_Log =
open('/home/nephish/Projects/Piv_CGI/logs/'+LogsInDir[NextLog], "r")
Defer = Count_in_Log.readlines()
Count_in_Log.close()
CountEmUp = len(Defer)
print 'number is '
print CountEmUp
NumLinesOnFile=line_finder(LogsRead, LogsInDir[NextLog])
print NumLinesOnFile
if CountEmUp > int(NumLinesOnFile):
print " "+LogsInDir[NextLog]+" is longer than on record"
XtraLines = int(NumLinesOnFile) - CountEmUp
print XtraLines
else:
print ' '+LogsInDir[NextLog]+" is not greater than on record"
XtraLines=0
print XtraLines
NextLog=NextLog+1
print 'done'
__
the line in question is this one:
NumLinesOnFile=line_finder(LogsRead, LogsInDir[NextLog])
print NumLinesOnFile
if i run this in idle printing NumLinesOnFile gives me a string 14
when run in a terminal it returns "None"
dont get it. is it because it is in a while loop?
any ideas would be awesome here.
thanks
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Re: [Tutor] search through a list
Danny Yoo wrote: > > >>#this function returns the number of lines on record for each log file. >>def line_finder(LogsInDir, flag): >>flag=flag.strip() >>return_next=False >>for line in LogsInDir: >>if return_next: >>return line.strip() >>else: >>if line.strip() == flag: >>return_next = True >> >> > > >Hi Nephish, > >Question: what should the program return if return_next is never True? >That is, what happens if the program does not find the flag that you're >looking for? > >The comment of this function also seems a bit weird: it appears to try to >return the very next line after the 'flag' line of a file: it's not doing >any counting of numbers, as far as I can tell. > > > > >>the line in question is this one: >> >>NumLinesOnFile=line_finder(LogsRead, LogsInDir[NextLog]) >>print NumLinesOnFile >> >>if i run this in idle printing NumLinesOnFile gives me a string 14 >> >> > >The function will return None if 'flag' can't be found in the LogsRead >list. Otherwise, it'll return one of the lines of the file. > >So I'd assume for the moment that line_finder can't find what it is trying >to find. You may want to test this yourself by adding some kind of >debugging statement in line_finder() to make it more clear if t can't find >what it's looking for. Does this sound reasonable? > > >Best of wishes to you! > > > > Ok, if the return_next is never True, returning None is very useful. If it is true, yes, i do want it to return the next line of the list. this is a list of files. It is a file name, followed by the number of lines in the file, this way i can only process the data that is new. Your suggestion sounds reasonable and i will work with it with a few more print statements to see exactly where it is failing. maybe i had something messed up in my string that it is looking for that wouldn't apply from IDLE. Thanks for your help. -shawn<>< ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] This should be easy
Hey there,
i have a script that i am trying to use to add a record to a MySQL
database.
i keep getting a syntax error.
this works
cursor.execute("INSERT INTO Table ( numberone ) VALUES ( 'one');")
but this does not
cursor.execute("INSERT INTO Table ( numberone, numbertwo ) VALUES
( 'one','two');")
what is getting scrambled here?
the error i get is syntax error in MySQL query, check the documentation,
blah blah blah
thanks
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Re: [Tutor] This should be easy
ok here is what i have,
cursor.execute("INSERT INTO History (autoinc, Site Name) VALUES
(12, 'Test');")
gives me this
''' _mysql_exceptions.ProgrammingError : (1064, "You have an error in
your SQL syntax. Check the manual that corresponds to your MySQL
server version for the right syntax to use near 'Name) VALUES (12,
'Test')' at line 1") '''
the autoinc field isn't really an auto-increment field, its an int.
That is left over from the migration from Access.
there are other fields in the table but all can be null.
this line works fine though
cursor.execute("INSERT INTO History (autoinc) VALUES (12);")
this line does not
cursor.execute("INSERT INTO History (Site Name) VALUES ('test');")
can you not have spaces in a field name ? is the quotes gone awry?
dont know what to do next.
please help !
thanks
On 07/18/2005 03:06:34 PM, Alberto Troiano wrote:
> I think it would be better for us if you send us the entire line
> that's giving you problems along with the error its givin you so we
> can start somewhere
>
> Right now I don't know where to look at
>
> Best Regards
>
> Alberto
>
>> From: nephish <[EMAIL PROTECTED]>
>> To: tutor@python.org
>> Subject: [Tutor] This should be easy
>> Date: Mon, 18 Jul 2005 20:02:38 +
>>
>> ok here is the error i am getting.
>> You have an error in your SQL syntax. Check the manual that
>> corrosponds
>> to your MySQL version for the right syntax near Name ) values ('one',
>> 'two')
>>
>> thanks
>>
>> ___
>> Tutor maillist - Tutor@python.org
>> http://mail.python.org/mailman/listinfo/tutor
>
>
> Gaucho
>
>
>
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[Tutor] This should be easy
ok here is the error i am getting.
You have an error in your SQL syntax. Check the manual that corrosponds
to your MySQL version for the right syntax near Name ) values ('one',
'two')
thanks
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Re: [Tutor] This should be easy
Hey! looks like that is what the problem was.
i used the MySQL Migration toolkit to transfer all the records
over from Access to MySQL.
man, you really saved me a lot of time and frustration.
should have written in about 6 hours ago
thank you very much.
On 07/18/2005 03:41:59 PM, Alberto Troiano wrote:
> Hey
>
> Your problem is in the database
> I'm surprised how MySQL let you put a space in a field
> In MySQL you can't have spaces, as far as I know
> Try renaming the field by enteriig to the console and making the
> alter table sentence and put Site_Name instead of Site Name. Then
> make the query again and see what happens
>
> mysql> create table d(autoinc int(4) primary key,Site Name
> varchar(30));
> ERROR 1064: You have an error in your SQL syntax. Check the manual
> that corresponds to your MySQL server version for the right syntax to
> use near 'Name varchar(30))'
>
> This is the error I get from MySQL Server when I try to create a
> field with a space and check the solution:
> mysql> create table d(autoinc int(4) primary key,Site_Name
> varchar(30));
> Query OK, 0 rows affected (0.14 sec)
>
> This should fix your problem.
>
> Best Regards to you
>
> Alberto
>
>> From: nephish <[EMAIL PROTECTED]>
>> To: Alberto Troiano <[EMAIL PROTECTED]>
>> CC: tutor@python.org
>> Subject: Re: [Tutor] This should be easy
>> Date: Mon, 18 Jul 2005 20:32:55 +
>>
>> ok here is what i have,
>> cursor.execute("INSERT INTO History (autoinc, Site Name) VALUES
>> (12, 'Test');")
>>
>> gives me this
>> ''' _mysql_exceptions.ProgrammingError : (1064, "You have an error in
>> your SQL syntax. Check the manual that corresponds to your MySQL
>> server version for the right syntax to use near 'Name) VALUES
>> (12,
>> 'Test')' at line 1") '''
>>
>> the autoinc field isn't really an auto-increment field, its an int.
>> That is left over from the migration from Access.
>>
>> there are other fields in the table but all can be null.
>>
>> this line works fine though
>> cursor.execute("INSERT INTO History (autoinc) VALUES (12);")
>>
>> this line does not
>> cursor.execute("INSERT INTO History (Site Name) VALUES ('test');")
>>
>> can you not have spaces in a field name ? is the quotes gone awry?
>>
>> dont know what to do next.
>> please help !
>>
>> thanks
>>
>>
>>
>>
>> On 07/18/2005 03:06:34 PM, Alberto Troiano wrote:
>> > I think it would be better for us if you send us the entire line
>> > that's giving you problems along with the error its givin you so we
>> > can start somewhere
>> >
>> > Right now I don't know where to look at
>> >
>> > Best Regards
>> >
>> > Alberto
>> >
>> >> From: nephish <[EMAIL PROTECTED]>
>> >> To: tutor@python.org
>> >> Subject: [Tutor] This should be easy
>> >> Date: Mon, 18 Jul 2005 20:02:38 +
>> >>
>> >> ok here is the error i am getting.
>> >> You have an error in your SQL syntax. Check the manual that
>> >> corrosponds
>> >> to your MySQL version for the right syntax near Name ) values
>> ('one',
>> >> 'two')
>> >>
>> >> thanks
>> >>
>> >> ___
>> >> Tutor maillist - Tutor@python.org
>> >> http://mail.python.org/mailman/listinfo/tutor
>> >
>> >
>> > Gaucho
>> >
>> >
>> >
>>
>> ___
>> Tutor maillist - Tutor@python.org
>> http://mail.python.org/mailman/listinfo/tutor
>
>
> Gaucho
>
>
>
___
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[Tutor] confusing smtp problem
Hey there, i am trying to get an email through an SMTP server on a
windows computer from a linux machine on the same network.
>>> import smtplib
>>> import MySQLdb
>>> Server = smtplib.SMTP('10.10.10.32')
>>> ToAddress = '[EMAIL PROTECTED]'
>>> FromAddress = '[EMAIL PROTECTED]'
>>> Message = 'Some text message'
>>> Server.sendmail(FromAddress, ToAddress, Message)
{}
but nothing goes through,
now if i do this...
>>> Server.connect()
i get this
Traceback (innermost last):
File "", line 1, in ?
File "/usr/lib/python2.3/smtplib.py", line 303, in connect
(code, msg) = self.getreply()
File "/usr/lib/python2.3/smtplib.py", line 347, in getreply
raise SMTPServerDisconnected("Connection unexpectedly closed")
SMTPServerDisconnected: Connection unexpectedly closed
now if i use the server on this computer ('localhost')
everything works ok.
any ideas?
thanks,
<><
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Re: [Tutor] confusing smtp problem
Sorry about the delay getting back on this one guys,
yeah, i am running a linux machine.
no firewall between here and there (both behind a firewall router)
yeah, sylpheed does send on port 25
the windows machine has the Merek email server on board.
i would like my scripts to be able to send to it,
as a backup, but the debian linux MTA (Exim i think) is working.
So it isn't too big a deal if it does not.
telnet and helo does work, it lets me in from the command line
from the linux machine (where my python scripts are) to the win
machine (where the other mail server is)
we dont need POP for this at all, we are sending only.
incidentally, i appreciate you guys time and attention to this.
all the best,
shawn
On Wed, 2005-07-20 at 19:38 -0400, Reed L. O'Brien wrote:
> nephish wrote:
> > ok, my fault. the router assigned the smtp server a different address
> > no longer 10.10.10.32, now 10.10.10.04
> > tried the telnet thing and it worked, so i still dont know
> > why the script isnt working
> >
> > thanks
> Does it still give the same error
>
> ib.py", line 347, in getreply
> raise SMTPServerDisconnected("Connection unexpectedly closed")
> SMTPServerDisconnected: Connection unexpectedly closed
>
> or is it different??
>
> ~reed
>
>
> >
> >
> > On 07/20/2005 03:32:10 PM, Reed L. O'Brien wrote:
> >> nephish wrote:
> >> > On 07/20/2005 12:24:04 PM, Reed L. O'Brien wrote:
> >> >> nephish wrote:
> >> >> > Hey there, i am trying to get an email through an SMTP server on
> >> a
> >> >> > windows computer from a linux machine on the same network.
> >> >> >
> >> >> >
> >> >> >>>> import smtplib
> >> >> >>>> import MySQLdb
> >> >> >>>> Server = smtplib.SMTP('10.10.10.32')
> >> >> >>>> ToAddress = '[EMAIL PROTECTED]'
> >> >> >>>> FromAddress = '[EMAIL PROTECTED]'
> >> >> >>>> Message = 'Some text message'
> >> >> >>>> Server.sendmail(FromAddress, ToAddress, Message)
> >> >> >>>>
> >> >> > {}
> >> >> >
> >> >> > but nothing goes through,
> >> >> > now if i do this...
> >> >> >
> >> >> >>>> Server.connect()
> >> >> >>>>
> >> >> >
> >> >> > i get this
> >> >> >
> >> >> > Traceback (innermost last):
> >> >> >File "", line 1, in ?
> >> >> >File "/usr/lib/python2.3/smtplib.py", line 303, in connect
> >> >> > (code, msg) = self.getreply()
> >> >> >File "/usr/lib/python2.3/smtplib.py", line 347, in getreply
> >> >> > raise SMTPServerDisconnected("Connection unexpectedly
> >> closed")
> >> >> > SMTPServerDisconnected: Connection unexpectedly closed
> >> >> >
> >> >> > now if i use the server on this computer ('localhost')
> >> >> > everything works ok.
> >> >> >
> >> >> > any ideas?
> >> >> > thanks,
> >> >> > <><
> >> >> >
> >> >> > ___
> >> >> > Tutor maillist - Tutor@python.org
> >> >> > http://mail.python.org/mailman/listinfo/tutor
> >> >> >
> >> >> Can you telnet to port 25 on the other server?
> >> >> What does it respond to an EHLO command?
> >> >> HELO?
> >> >> can you get it to deliver there?
> >> >>
> >> >> ~r
> >> >>
> >> >> --
> >> >> 4.6692916090
> >> >> 'cmVlZG9icmllbkBnbWFpbC5jb20=\n'.decode('base64')
> >> >> http://www.spreadfirefox.com/?q=affiliates&id=16474&t=1
> >> >> keyID: 0x0FA09FCE
> >> >>
> >> >>
> >> >>
> >> >>
> >> > i did this
> >> > telnet 10.10.10.32
> >> > it responded with "unable to connect to remote host, connection
> >> refused"
> >> >
> >> > hmmm, perhaps there is something i am missing here.
> >> > this computer sits at 10.10.10.24
> >> > the mail server is at 10.10.10.32
> >> > and the other computer on the lan that can use it effectivly is at
> >> > 10.10.10.5 maybe the program it is using is passing some sort of
> >> > parameter that i am missing here.
> >> >
> >> > will check it all out again.
> >> >
> >> > thanks
> >> >
> >> That would be
> >> """use the IP you choose in lieu of localhost
> >> The 25 tels it to connect to the smtp port"""
> >> telnet localhost 25
> >> Trying 127.0.0.1...
> >> Connected to localhost.localdomain (127.0.0.1).
> >> Escape character is '^]'.
> >> 220 my.dom.com ESMTP
> >> EHLO any.com
> >> 250-my.dom.com
> >> 250-AUTH LOGIN CRAM-MD5 PLAIN
> >> 250-AUTH=LOGIN CRAM-MD5 PLAIN
> >> 250-STARTTLS
> >> 250-PIPELINING
> >> 250 8BITMIME
> >>
> >> Try HELO if EHLO doesn't work. If you can't connect at all, no smtp
> >> server is running; or it is running on a non-standard port.
> >>
> >> best,
> >> ~r
> >>
> >>
> >> --
> >> 4.6692916090
> >> 'cmVlZG9icmllbkBnbWFpbC5jb20=\n'.decode('base64')
> >> http://www.spreadfirefox.com/?q=affiliates&id=16474&t=1
> >> keyID: 0x0FA09FCE
> >>
> >>
> >>
> >>
> >>
> >
>
>
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Re: [Tutor] confusing smtp problem
ok this is what i get when i use host = '10.10.10.04 25'
resourse unavailable
line = self.sock.recv(size,socket.MSG_PEEK)
now if i use host = '10.10.10.04:25' it has all the appearences of
having worked, but the email never gets to its destination.
h.
i tried it the first way because that is what let me connect and
do the helo thing via telnet.
On 07/21/2005 09:21:14 AM, Reed L. O'Brien wrote:
> nephish wrote:
> > Sorry about the delay getting back on this one guys,
> > yeah, i am running a linux machine.
> > no firewall between here and there (both behind a firewall router)
> > yeah, sylpheed does send on port 25
> > the windows machine has the Merek email server on board.
> > i would like my scripts to be able to send to it,
> > as a backup, but the debian linux MTA (Exim i think) is working.
> > So it isn't too big a deal if it does not.
> > telnet and helo does work, it lets me in from the command line
> > from the linux machine (where my python scripts are) to the win
> > machine (where the other mail server is)
> >
> > we dont need POP for this at all, we are sending only.
> >
> > incidentally, i appreciate you guys time and attention to this.
> >
> > all the best,
> > shawn
> >
> >
>
> Does it still give the same error
>
> ib.py", line 347, in getreply
> raise SMTPServerDisconnected("Connection unexpectedly closed")
> SMTPServerDisconnected: Connection unexpectedly closed
>
> or is it different??
>
> ~reed
>
> --
> 4.6692916090
> 'cmVlZG9icmllbkBnbWFpbC5jb20=\n'.decode('base64')
> http://www.spreadfirefox.com/?q=affiliates&id=16474&t=1
> keyID: 0x0FA09FCE
>
>
>
>
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Re: [Tutor] confusing smtp problem
sorry i am late on this one didnt get a chance to look at
it today, perhaps in the morning i will crack this open
thanks guys!
On Thu, 2005-07-21 at 15:17 +, nephish wrote:
> ok this is what i get when i use host = '10.10.10.04 25'
> resourse unavailable
> line = self.sock.recv(size,socket.MSG_PEEK)
>
> now if i use host = '10.10.10.04:25' it has all the appearences of
> having worked, but the email never gets to its destination.
>
> h.
>
> i tried it the first way because that is what let me connect and
> do the helo thing via telnet.
>
>
> On 07/21/2005 09:21:14 AM, Reed L. O'Brien wrote:
> > nephish wrote:
> > > Sorry about the delay getting back on this one guys,
> > > yeah, i am running a linux machine.
> > > no firewall between here and there (both behind a firewall router)
> > > yeah, sylpheed does send on port 25
> > > the windows machine has the Merek email server on board.
> > > i would like my scripts to be able to send to it,
> > > as a backup, but the debian linux MTA (Exim i think) is working.
> > > So it isn't too big a deal if it does not.
> > > telnet and helo does work, it lets me in from the command line
> > > from the linux machine (where my python scripts are) to the win
> > > machine (where the other mail server is)
> > >
> > > we dont need POP for this at all, we are sending only.
> > >
> > > incidentally, i appreciate you guys time and attention to this.
> > >
> > > all the best,
> > > shawn
> > >
> > >
> >
> > Does it still give the same error
> >
> > ib.py", line 347, in getreply
> > raise SMTPServerDisconnected("Connection unexpectedly closed")
> > SMTPServerDisconnected: Connection unexpectedly closed
> >
> > or is it different??
> >
> > ~reed
> >
> > --
> > 4.6692916090
> > 'cmVlZG9icmllbkBnbWFpbC5jb20=\n'.decode('base64')
> > http://www.spreadfirefox.com/?q=affiliates&id=16474&t=1
> > keyID: 0x0FA09FCE
> >
> >
> >
> >
>
> ___
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> http://mail.python.org/mailman/listinfo/tutor
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[Tutor] how to write a line
Hey there, kinda newbie question here. i know how to read the lines of a txt file. i know how to write a txt file. but how do i overwrite a line value with another value ? i mean, how do go to, say, line 3 of a text file and replace what is written on line 3 with something else? thanks <>< ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] how to write a line
i get it. manipulate everything while it is read. make my changes and use writelines(list from readlines earlier) so i kinda just hold everything in the list until i overwrite the original. thats great. my file is only 8 lines long. no problem thanks a lot ! Seems easy now. -shawn On 07/25/2005 04:18:08 PM, Danny Yoo wrote: > > > On Mon, 25 Jul 2005, nephish wrote: > > > i know how to read the lines of a txt file. > > i know how to write a txt file. > > > > but how do i overwrite a line value with another value ? > > > > i mean, how do go to, say, line 3 of a text file and replace what is > > written on line 3 with something else? > > Hi Nephish, > > It's slightly difficult to replace a single line of a file if all of > the > lines are different lengths. > > But if you can hold the whole file in memory at once, then the > following > should work: > > readlines() the file's contents into a list. > > Do changes on that list of lines. > > writelines() all the lines back out. > > So the idea is that we use an intermediate list and do all our work on > that list first. We treat the files just as storage. > > Does this make sense? Please feel free to ask more questions about > this. > > > > ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] i know this should be easy
Hey there, i have a simple question. if something returns a true or false, how do i test for it with an if statement? i am using pygtk with a toggle button that returns TRUE if checked and FALSE if not. do i need quotes around the TRUE / FALSE or should i use 1 and 0? Auto_Tog = self.AutoCheckRaw.get_active() if str(AddDay_Tog)== '1': do so and so. is this right? thanks ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] i know this should be easy
Jeremy Jones wrote: > nephish wrote: > >> Hey there, >> i have a simple question. >> if something returns a true or false, how do i test for it with an if >> statement? >> i am using pygtk with a toggle button that returns TRUE if checked >> and FALSE if not. >> do i need quotes around the TRUE / FALSE or should i use 1 and 0? >> >> Auto_Tog = self.AutoCheckRaw.get_active() >> if str(AddDay_Tog)== '1': >>do so and so. >> >> > If ``get_active()`` returns True or False (or 1 or 0), you could just > do:: > >if self.AutoCheckRaw.get_active(): > do_your_True_stuff_here() >else: > do_your_False_stuff_here() > > >> is this right? >> >> thanks >> ___ >> Tutor maillist - Tutor@python.org >> http://mail.python.org/mailman/listinfo/tutor >> >> >> > Jeremy > i knew this would be an easy one. thanks very much shawn ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] i know this should be easy
Kent Johnson wrote: >nephish wrote: > > >>Hey there, >>i have a simple question. >>if something returns a true or false, how do i test for it with an if >>statement? >>i am using pygtk with a toggle button that returns TRUE if checked and >>FALSE if not. >>do i need quotes around the TRUE / FALSE or should i use 1 and 0? >> >>Auto_Tog = self.AutoCheckRaw.get_active() >>if str(AddDay_Tog)== '1': >>do so and so. >> >> > >I'm not sure what you mean by TRUE and FALSE but you can most likely just test >it directly: > >Auto_Tog = self.AutoCheckRaw.get_active() >if AddDay_Tog: >do so and so. > >>From http://docs.python.org/ref/Booleans.html#Booleans > >In the context of Boolean operations, and also when expressions are used by >control flow statements, the following values are interpreted as false: None, >numeric zero of all types, empty sequences (strings, tuples and lists), and >empty mappings (dictionaries). All other values are interpreted as true. > >So any reasonable values for TRUE and FALSE will work fine. > >Kent > >___ >Tutor maillist - Tutor@python.org >http://mail.python.org/mailman/listinfo/tutor > > > cool. thanks much ! shawn ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] Need help with serial input
Hey there, i am using the serial module and trying to get some info over an RS232 port. Seems to be comming in ok, but when i print it out, its in ASCII instead of hex. is there a way to have python read serial in hex bytes instead of ASCII ? thanks. shawn ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] need some help with ascii hex
Hey there, i am using the serial module and trying to get some info over an RS232 port. Seems to be comming in ok, but when i print it out, its in ASCII instead of hex. is there a way to have python read serial in hex bytes instead of ASCII ? thanks. shawn ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] need some help with ascii hex
Alan G wrote: > Hi Francois, > >> I'm not a Tutor but I found this wich could help you: > > > If you are on the tutor list you are a tutor. We don't have any division > of role, everyone helps and everuone can ask for help. We are all equals. > >> To convert character data to integers, you can use the ord() >> function, and to convert a number to hex notation you can use the >> hex() function. > > > And your advice was spot on so you see, you are a tutor! :-) > > Alan G > Author of the Learn to Program web tutor > http://www.freenetpages.co.uk/hp/alan.gauld > > > ord() got me on track. thanks. once i had that, i really dont need hex i use ord() to get an integer and then i can log it that way. thanks for your help this was a head banger for a while. shawn ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] how to make a script do two things at once.
Hey there,
i have a simple question about getting a script to do
two things at once.
like this.
for i in range(100):
print i
time.sleep(.2)
if i == 15:
os.system('python /home/me/ipupdate.py')
print 'done'
when i run this, it stops at 15 and runs the script called out in the
os.system line. i know it is supposed to do that. But, how could i get a
script to do this without stopping the count (or delaying it unill the
script called exits) I don' t have to run it this way, i can import it
if necessary as a module. or whatever will work so i can execute two
things at once.
thanks
shawn
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Re: [Tutor] how to make a script do two things at once.
Kent Johnson wrote:
>nephish wrote:
>
>
>>Hey there,
>>i have a simple question about getting a script to do
>>two things at once.
>>like this.
>>
>>
>>for i in range(100):
>>print i
>>time.sleep(.2)
>>if i == 15:
>>os.system('python /home/me/ipupdate.py')
>>
>>print 'done'
>>
>>when i run this, it stops at 15 and runs the script called out in the
>>os.system line. i know it is supposed to do that. But, how could i get a
>>script to do this without stopping the count (or delaying it unill the
>>script called exits)
>>
>>
>
>One way to get a script to do two things 'at once' is to use threads. Threads
>are also a good way to introduce strange bugs into your program so you should
>do some reading about them. I can't find a good introduction - anyone else
>have a suggestion? Here is a brief one:
>http://www.wellho.net/solutions/python-python-threads-a-first-example.html
>
>Here are a couple of articles, not really introductory:
>http://linuxgazette.net/107/pai.html
>http://www.devshed.com/c/a/Python/Basic-Threading-in-Python/
>
>Anyway here is something to get you started, this version of your program
>starts a new thread to do the os.system call, that way the main thread doesn't
>block.
>
>import os, threading, time
>
>def doSomething():
>''' This function will be called from the second thread '''
>os.system('''python -c "from time import sleep;sleep(2);print 'hello'"''')
>
>for i in range(30):
>print i
>time.sleep(.2)
>if i == 10:
>print 'Starting thread'
>threading.Thread(target=doSomething).start()
>
>print 'done'
>
>Kent
>
>___
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>
>
>
thanks for all of the responses, yep, looks like threads is what i want
to go with. got the docs you guys linked me to bookmarked. this is going
to take a bit of research.
thanks again for showing me where to start.
shawn
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Re: [Tutor] how to make a script do two things at once.
Michael Lange wrote:
>On Sun, 21 Aug 2005 16:23:20 -0500
>nephish <[EMAIL PROTECTED]> wrote:
>
>
>
>>Hey there,
>>i have a simple question about getting a script to do
>>two things at once.
>>like this.
>>
>>
>>for i in range(100):
>>print i
>>time.sleep(.2)
>>if i == 15:
>>os.system('python /home/me/ipupdate.py')
>>
>>print 'done'
>>
>>when i run this, it stops at 15 and runs the script called out in the
>>os.system line. i know it is supposed to do that. But, how could i get a
>>script to do this without stopping the count (or delaying it unill the
>>script called exits) I don' t have to run it this way, i can import it
>>if necessary as a module. or whatever will work so i can execute two
>>things at once.
>>
>>
>>
>
>If you just need to call a unix system command you can simply add "&" to the
>command string to
>make it run in the background.
>
>Regards
>
>Michael
>
>___
>Tutor maillist - Tutor@python.org
>http://mail.python.org/mailman/listinfo/tutor
>
>
>
Well Cool , yeah, i run linux. this would work out great.
thanks!
shawn
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[Tutor] threading problem in GUI
Hello there !
i am having a problem with threading.
OK, i have this GUI app that i am building with pygtk.
there is a process (four actually, just working on getting one right now)
that needs to run in the background.
there is a button that starts the background function. But, it locks up
the gui. it doesn't run in the background, it locks everything up. It
still runs though.
one of the things this background process is to do is updata a viewable
area on the GUI. Now when run from a terminal, when i hit CTRL+C
it stops the thread, but doesnt kill the GUI, and the TextView gets
updated right then with everything it should have gotten before.
def Serial1():
print 'running serial 1'
ser = serial.Serial('/dev/ttyS15', 2400, timeout=None)
loopy = 1
i = 1
while loopy < 5:
x_Now = strftime('%Y-%m-%d %H:%M:%S')
i = i + 1
a = ser.read(1)#read one byte
a = ord(a) # change byte to integer
if (a < 64 )or (a > 127):
continue
b = ser.read(1)
b = ord(b)
if (b < 64 )or (b > 127):
continue
c = ser.read(1)
c = ord(c)
if c < 92:
continue
d = ser.read(1)
d = ord(d)
if d < 128:
continue
Sensor_ID = (a & 63) + (b & 63) * 64 + (c & 1) * 4096
Status = (c & 62) / 2 + (d & 63) * 32
c = int(c)
d = int(d)
x_Now = strftime('%Y-%m-%d %H:%M:%S')
f = open('/home/piv/PivData/tmp/Serial/'+str(i), 'w')
Input1Data =
str(Sensor_ID)+'\t'+str(Status)+'\t->\t'+x_Now+'\n'
Input1Iter = self.Input1Buffer.get_end_iter()
self.Input1Buffer.insert(Input1Iter,
Input1Data)
f.write(str(Sensor_ID)+'\n'+str(c)+'\n'+str(d)+'\n'+str(Status)+'\n'+x_Now)
f.close()
thread.start_new(Serial1())
the code may not be best form, i am still fairly new at this. so i am
also open to
any constructive critisism.
thanks
shawn
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Re: [Tutor] threading problem in GUI
Pierre Barbier de Reuille wrote:
>nephish a écrit :
>
>
>>Hello there !
>>
>>
>
>Hello,
>
>
>
>>i am having a problem with threading.
>>OK, i have this GUI app that i am building with pygtk.
>>there is a process (four actually, just working on getting one right now)
>>that needs to run in the background.
>>
>>
>
>Please, do not mix "process" and "threads" ... there very different ...
>you're talking about threads here, so you want Threads to run in the
>background ...
>
>
>
>>there is a button that starts the background function. But, it locks up
>>the gui. it doesn't run in the background, it locks everything up. It
>>still runs though.
>>
>>
>
>That's just normal ... if you read PyGtk documentation, you'll see you
>need to initialise PyGtk to handle threads :
>
>http://www.async.com.br/faq/pygtk/index.py?req=index -> 20. The GTK
>Mainloop and Threading
>
>http://www.async.com.br/faq/pygtk/index.py?req=show&file=faq20.006.htp
>-> This is exactly your problem !
>
>http://www.pygtk.org/pygtk2reference/gdk-functions.html#function-gdk--threads-init
>
>This is done like this :
>
># First call to PyGtk function ever
>gtk.gdk.threads_init()
># Here initialize what you want
>[...]
># Launch the Gtk loop
>gtk.gdk.threads_enter() # Unneeded if you don't want to call GUI
># functions from other threads
>gtk.main()
>gtk.gdk.threads_leave() # Needed only with threads_enter
>
>
>
>>one of the things this background process is to do is updata a viewable
>>area on the GUI. Now when run from a terminal, when i hit CTRL+C
>>it stops the thread, but doesnt kill the GUI, and the TextView gets
>>updated right then with everything it should have gotten before.
>>
>>
>>def Serial1():
>>print 'running serial 1'
>>ser = serial.Serial('/dev/ttyS15', 2400, timeout=None)
>>loopy = 1
>>i = 1
>>while loopy < 5:
>>x_Now = strftime('%Y-%m-%d %H:%M:%S')
>>i = i + 1
>>a = ser.read(1)#read one byte
>>a = ord(a) # change byte to integer
>>if (a < 64 )or (a > 127):
>>continue
>>b = ser.read(1)
>>b = ord(b)
>>if (b < 64 )or (b > 127):
>>continue
>>c = ser.read(1)
>>c = ord(c)
>>if c < 92:
>>continue
>>d = ser.read(1)
>>d = ord(d)
>>if d < 128:
>>continue
>>Sensor_ID = (a & 63) + (b & 63) * 64 + (c & 1) * 4096
>>Status = (c & 62) / 2 + (d & 63) * 32
>>c = int(c)
>>d = int(d)
>>x_Now = strftime('%Y-%m-%d %H:%M:%S')
>>f = open('/home/piv/PivData/tmp/Serial/'+str(i), 'w')
>>Input1Data =
>>str(Sensor_ID)+'\t'+str(Status)+'\t->\t'+x_Now+'\n'
>>Input1Iter = self.Input1Buffer.get_end_iter()
>>self.Input1Buffer.insert(Input1Iter,
>>Input1Data)
>>
>>f.write(str(Sensor_ID)+'\n'+str(c)+'\n'+str(d)+'\n'+str(Status)+'\n'+x_Now)
>>
>>
>>f.close()
>>thread.start_new(Serial1())
>>
>>the code may not be best form, i am still fairly new at this. so i am
>>also open to
>>any constructive critisism.
>>
>>thanks
>>shawn
>>___
>>Tutor maillist - Tutor@python.org
>>http://mail.python.org/mailman/listinfo/tutor
>>
>>
>>
>
>
>
ok, i am still having a little problem understanding.
tried it but i don't know if i have things set in the right order.
gtk.gdk.threads_init()
# Here initialize what you want
[...]
# Launch the Gtk loop
gtk.gdk.threads_enter() # Unneeded if you don't want to call GUI
# functions from other threads
gtk.main()
gtk.gdk.threads_leave() # Needed only with threads_enter
at the part where you wrote
# Here initialize what you want
[...]
is that where i define the function that will run the thread?
i get the part about having the enter and leave
i just seem to have a hang up (so to speak) with where the function gets
defined.
do i need to build it as a class like the example in the link you sent?
thanks for your help on this
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Re: [Tutor] threading problem in GUI
Pierre Barbier de Reuille wrote:
>nephish a écrit :
>
>
>>Pierre Barbier de Reuille wrote:
>>
>>[...]
>>ok, i am still having a little problem understanding.
>>tried it but i don't know if i have things set in the right order.
>>
>>
>>gtk.gdk.threads_init()
>># Here initialize what you want
>>[...]
>># Launch the Gtk loop
>>gtk.gdk.threads_enter() # Unneeded if you don't want to call GUI
>> # functions from other threads
>>gtk.main()
>>gtk.gdk.threads_leave() # Needed only with threads_enter
>>
>>at the part where you wrote # Here initialize what you want
>>[...]
>>is that where i define the function that will run the thread?
>>
>>i get the part about having the enter and leave
>>i just seem to have a hang up (so to speak) with where the function gets
>>defined.
>>do i need to build it as a class like the example in the link you sent?
>>
>>
>
>Well, no you don't need to create a class.
>
>As for the place where to put your function, it's not a problem, [...]
>is the place where you will *execute* some initialization code (if
>needed) before you launch your interface. That's all (typically that's
>where you will instanciate your widgets).
>
>
>
>>thanks for your help on this
>>
>>
>>
>Your welcome,
>
>Pierre
>
>
>
ok, i am still kinda stuck.
im posting what i think is necessary, because the whole thing is rather
long.
so here goes.
#!/usr/bin/python
import os
import time
from time import strftime
import sys
import gtk
import pygtk
import serial
import threading
from threading import Thread
import tokenize
import gtk.glade
import weakref
import inspect
import re
gtk.gdk.threads_init()
def main(self):
gtk.gdk.threads_enter()
gtk.main()
gtk.gdk.threads_leave()
def on_StartEnginesButton_clicked(self, widget, *args):
print "on_StartEnginesButton_clicked called with self.%s" %
widget.get_name()
Input1Iter = self.Input1Buffer.get_end_iter()
Input2Iter = self.Input2Buffer.get_end_iter()
Input1Data = 'Reading Serial device ttyS14 \n'
Input2Data = 'Reading Serial device ttys15 \n'
self.Input1Buffer.insert(Input1Iter, Input1Data)
self.Input2Buffer.insert(Input2Iter, Input2Data)
time.sleep(2)
def Serial1():
print 'running serial 1'
ser = serial.Serial('/dev/ttyS15', 2400, timeout=None)
loopy = 1
i = 1
while loopy < 5:
for x in range(5):
i = i + 1
a = ser.read(1)#read one byte
a = ord(a) # change byte to integer
if (a < 64 )or (a > 127):
break
b = ser.read(1)
b = ord(b)
if (b < 64 )or (b > 127):
break
c = ser.read(1)
c = ord(c)
if c < 92:
break
d = ser.read(1)
d = ord(d)
if d < 128:
break
Sensor_ID = (a & 63) + (b & 63) * 64 + (c & 1) * 4096
Status = (c & 62) / 2 + (d & 63) * 32
c = int(c)
d = int(d)
x_Now = strftime('%Y-%m-%d %H:%M:%S')
gtk.threads_enter()
Input1Data =
str(Sensor_ID)+'\t'+str(Status)+'\t->\t'+x_Now+'\n'
Input1Iter = self.Input1Buffer.get_end_iter()
self.Input1Buffer.insert(Input1Iter, Input1Data)
gtk.threads_leave()
f = open('/home/piv/PivData/tmp/Serial/'+str(i), 'w')
f.write(str(Sensor_ID)+'\n'+str(c)+'\n'+str(d)+'\n'+str(Status)+'\n'+x_Now)
f.close()
Thread.start(Serial1())
thanks, i am learning from several sources. two books from O'Reilly, and
a dozen or so websites,
not everybody does everything the same way . if something here looks
alarming, please let me know.
thanks
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Re: [Tutor] [tutor] threading problem in GUI
Serial1() just call the function ... it will be evaluated and then the
result will be sent to Thread.start ...
So try:
Thread.start(Serial)
ok,
so far the thread runs fine in the background, but just does not send the
output to the
textbuffer, and hangs up the rest of the show.
i think i am off in how i have the gtk.main() set up
and how the main class is set up
class SimpleGladeApp:
def __init__(self, path, root=None, domain=None, **kwargs):
if os.path.isfile(path):
self.glade_path = path
else:
glade_dir = os.path.dirname( sys.argv[0] )
self.glade_path = os.path.join(glade_dir, path)
for key, value in kwargs.items():
try:
setattr(self, key, weakref.proxy(value) )
except TypeError:
setattr(self, key, value)
self.glade = None
self.install_custom_handler(self.custom_handler)
self.glade = self.create_glade(self.glade_path, root, domain)
if root:
self.main_widget = self.get_widget(root)
else:
self.main_widget = None
self.normalize_names()
self.add_callbacks(self)
self.new()
def main(self):
gtk.gdk.threads_enter()
gtk.main()
gtk.gdk.threads_leave()
class Main(SimpleGladeApp):
def __init__(self, path="pivcontrolcenter.glade",
root="Main",
domain=app_name, **kwargs):
path = os.path.join(glade_dir, path)
SimpleGladeApp.__init__(self, path, root, domain, **kwargs)
def on_StartEnginesButton_clicked(self, widget, *args):
print "on_StartEnginesButton_clicked called with self.%s" %
widget.get_name()
Input1Iter = self.Input1Buffer.get_end_iter()
Input2Iter = self.Input2Buffer.get_end_iter()
Input1Data = 'Reading Serial device ttyS14 \n'
Input2Data = 'Reading Serial device ttys15 \n'
self.Input1Buffer.insert(Input1Iter, Input1Data)
self.Input2Buffer.insert(Input2Iter, Input2Data)
time.sleep(1)
def Serial1():
print 'running serial 1'
ser = serial.Serial('/dev/ttyS15', 2400, timeout=None)
loopy = 1
i = 1
while loopy < 5:
for x in range(5):
i = i + 1
a = ser.read(1)#read one byte
a = ord(a) # change byte to integer
if (a < 64 )or (a > 127):
break
b = ser.read(1)
b = ord(b)
if (b < 64 )or (b > 127):
break
c = ser.read(1)
c = ord(c)
if c < 92:
break
d = ser.read(1)
d = ord(d)
if d < 128:
break
Sensor_ID = (a & 63) + (b & 63) * 64 + (c & 1) * 4096
Status = (c & 62) / 2 + (d & 63) * 32
c = int(c)
d = int(d)
x_Now = strftime('%Y-%m-%d %H:%M:%S')
#gtk.threads_enter()
Input1Data =
str(Sensor_ID)+'\t'+str(Status)+'\t->\t'+x_Now+'\n'
Input1Iter = self.Input1Buffer.get_end_iter()
self.Input1Buffer.insert(Input1Iter, Input1Data)
#gtk.threads_leave()
f = open('/home/piv/PivData/tmp/Serial/'+str(i), 'w')
f.write(str(Sensor_ID)+'\n'+str(c)+'\n'+str(d)+'\n'+str(Status)+'\n'+x_Now)
f.close()
Thread.start(Serial1())
def main():
main = Main()
#gtk.threads_enter()
main.run()
#gtk.threads_leave()
if __name__ == "__main__":
#gtk.threads_enter()
main()
#gtk.threads_leave()
lots of comments, been trying this several ways.
cheers
shawn
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Re: [Tutor] [tutor] threading problem in GUI
nephish wrote:
> Serial1() just call the function ... it will be evaluated and then the
> result will be sent to Thread.start ...
>
> So try:
>
> Thread.start(Serial)
>
>
>ok,
>so far the thread runs fine in the background, but just does not send the
>output to the
>textbuffer, and hangs up the rest of the show.
>
>i think i am off in how i have the gtk.main() set up
>and how the main class is set up
>
>class SimpleGladeApp:
>def __init__(self, path, root=None, domain=None, **kwargs):
>if os.path.isfile(path):
>self.glade_path = path
>else:
>glade_dir = os.path.dirname( sys.argv[0] )
>self.glade_path = os.path.join(glade_dir, path)
>for key, value in kwargs.items():
>try:
>setattr(self, key, weakref.proxy(value) )
>except TypeError:
>setattr(self, key, value)
>self.glade = None
>self.install_custom_handler(self.custom_handler)
>self.glade = self.create_glade(self.glade_path, root, domain)
>if root:
>self.main_widget = self.get_widget(root)
>else:
>self.main_widget = None
>self.normalize_names()
>self.add_callbacks(self)
>self.new()
>
>def main(self):
>gtk.gdk.threads_enter()
>gtk.main()
>gtk.gdk.threads_leave()
>
>class Main(SimpleGladeApp):
>def __init__(self, path="pivcontrolcenter.glade",
> root="Main",
> domain=app_name, **kwargs):
>path = os.path.join(glade_dir, path)
>SimpleGladeApp.__init__(self, path, root, domain, **kwargs)
>
>def on_StartEnginesButton_clicked(self, widget, *args):
>print "on_StartEnginesButton_clicked called with self.%s" %
> widget.get_name()
>Input1Iter = self.Input1Buffer.get_end_iter()
>Input2Iter = self.Input2Buffer.get_end_iter()
>Input1Data = 'Reading Serial device ttyS14 \n'
>Input2Data = 'Reading Serial device ttys15 \n'
>self.Input1Buffer.insert(Input1Iter, Input1Data)
>self.Input2Buffer.insert(Input2Iter, Input2Data)
>time.sleep(1)
>def Serial1():
>print 'running serial 1'
>ser = serial.Serial('/dev/ttyS15', 2400, timeout=None)
>loopy = 1
>i = 1
>while loopy < 5:
>for x in range(5):
>i = i + 1
>a = ser.read(1)#read one byte
>a = ord(a) # change byte to integer
>if (a < 64 )or (a > 127):
>break
>b = ser.read(1)
>b = ord(b)
>if (b < 64 )or (b > 127):
>break
>c = ser.read(1)
>c = ord(c)
>if c < 92:
>break
>d = ser.read(1)
>d = ord(d)
>if d < 128:
>break
>Sensor_ID = (a & 63) + (b & 63) * 64 + (c & 1) * 4096
>Status = (c & 62) / 2 + (d & 63) * 32
>c = int(c)
>d = int(d)
>x_Now = strftime('%Y-%m-%d %H:%M:%S')
>#gtk.threads_enter()
>Input1Data =
> str(Sensor_ID)+'\t'+str(Status)+'\t->\t'+x_Now+'\n'
>Input1Iter = self.Input1Buffer.get_end_iter()
>self.Input1Buffer.insert(Input1Iter, Input1Data)
>#gtk.threads_leave()
>f = open('/home/piv/PivData/tmp/Serial/'+str(i), 'w')
>
> f.write(str(Sensor_ID)+'\n'+str(c)+'\n'+str(d)+'\n'+str(Status)+'\n'+x_Now)
>
>f.close()
>Thread.start(Serial1())
>
>def main():
>main = Main()
>#gtk.threads_enter()
>main.run()
>#gtk.threads_leave()
>
>if __name__ == "__main__":
>#gtk.threads_enter()
>main()
>#gtk.threads_leave()
>
>lots of comments, been trying this several ways.
>
>cheers
>shawn
>
>
>
>
>
>___
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>http://mail.python.org/mailman/listinfo/tutor
>
>
>
one more thing.
if i uncomment the lines
gtk.threads_enter()
and
gtk.threads_leave()
the whole thing locks up when the function is called.
the gui, and the thread both lock up.
thanks
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Re: [Tutor] [tutor] threading problem in GUI
Pierre Barbier de Reuille wrote:
>nephish a écrit :
>
>
>>one more thing.
>>if i uncomment the lines
>>gtk.threads_enter()
>>and
>>gtk.threads_leave()
>>the whole thing locks up when the function is called.
>>the gui, and the thread both lock up.
>>
>>
>
>Well, that's just normal. However, what you should do is to send a
>signal from your thread with the text to append in your textbuffer.
>Then, you catch the signal in your main widget to show it !
>
>To emit a signal use :
>
>gtk.gdk.threads_enter()
>self.emit("writing", str)
>gtk.gdk.threads_leave()
>
>To catch it:
>
>
>emitting_object.connect("writing", self.method_handling_to_signal)
>
>Well, I used that and it just work ! Using the signal does not solve any
>threading problem but allow you to separate between the event and the
>answer to the event, which is a good habit to take !
>
>Pierre
>
>
>
>
cool, will try.
where exactly do i put this line? Just right in the main loop?
emitting_object.connect("writing", self.method_handling_to_signal)
thanks !
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Re: [Tutor] [tutor] threading problem in GUI
Pierre Barbier de Reuille wrote:
>nephish a écrit :
>
>
>>one more thing.
>>if i uncomment the lines
>>gtk.threads_enter()
>>and
>>gtk.threads_leave()
>>the whole thing locks up when the function is called.
>>the gui, and the thread both lock up.
>>
>>
>
>Well, that's just normal. However, what you should do is to send a
>signal from your thread with the text to append in your textbuffer.
>Then, you catch the signal in your main widget to show it !
>
>To emit a signal use :
>
>gtk.gdk.threads_enter()
>self.emit("writing", str)
>gtk.gdk.threads_leave()
>
>To catch it:
>
>
>emitting_object.connect("writing", self.method_handling_to_signal)
>
>Well, I used that and it just work ! Using the signal does not solve any
>threading problem but allow you to separate between the event and the
>answer to the event, which is a good habit to take !
>
>Pierre
>
>
>
>
I finally got it working !!
thanks so much for all your help
i would not have gotten it working without you,
(or this mailing list)
God bless
shawn
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Re: [Tutor] [tutor] threading problem in GUI
Pierre Barbier de Reuille wrote:
>Great :)
>
>Just to be clear about that: you can see the "connect" line as a dynamic
>registration process (with the symetric disconnect operation available
>via ... "disconnect"). The only thing you need is to connect (at
>runtime) the even before it's called (obvious isn't it ? ;) ), but you
>have no other constraint. You can even choose to connect/disconnect
>events when they are used/unused ... You can also connect a single event
>many times (to different functions) or you can connect many events to
>the same function. This is the "power" of this system :) Like now if you
>want to log your strings on a file, you just define the function writing
>in the file and connect the event to this function: you'll have both the
>GUI and the log-file outputs !
>
>This is, AFAIK, the best existing implementation for user interfaces !
>
>Pierre
>
>nephish a écrit :
>
>
>>Pierre Barbier de Reuille wrote:
>>
>>
>>
>>>nephish a écrit :
>>>
>>>
>>>
>>>
>>>>one more thing.
>>>>if i uncomment the lines
>>>>gtk.threads_enter()
>>>>and
>>>>gtk.threads_leave()
>>>>the whole thing locks up when the function is called.
>>>>the gui, and the thread both lock up.
>>>>
>>>>
>>>>
>>>Well, that's just normal. However, what you should do is to send a
>>>signal from your thread with the text to append in your textbuffer.
>>>Then, you catch the signal in your main widget to show it !
>>>
>>>To emit a signal use :
>>>
>>> gtk.gdk.threads_enter()
>>> self.emit("writing", str)
>>> gtk.gdk.threads_leave()
>>>
>>>To catch it:
>>>
>>>
>>> emitting_object.connect("writing", self.method_handling_to_signal)
>>>
>>>Well, I used that and it just work ! Using the signal does not solve any
>>>threading problem but allow you to separate between the event and the
>>>answer to the event, which is a good habit to take !
>>>
>>>Pierre
>>>
>>>
>>>
>>>
>>>
>>>
>>I finally got it working !!
>>thanks so much for all your help
>>i would not have gotten it working without you,
>>(or this mailing list)
>>
>>God bless
>>shawn
>>
>>
>>
>
>
>
indeed. i really want to get into this stuff more.
i think a whole lot of what i have been doing could really be
done easier and cleaner.
thanks for everything,
shawn
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Re: [Tutor] Boa-Constructor
Terry Kemmerer wrote: > Hey Guys, > > I am trying to pick an IDE, and it seems to me that Boa-Constructor > has great potential. However, in searching google looking to see what > others have said, I am reading that the latest version of > Boa-Constructor is unstable at best and crashes a lot.being said, > at least, by those promoting non-free IDE's. Yet, Boa-Constructor > looks from the outside to me, like a really great IDE. > > Does anyone who is using this latest version or who has tried this > latest version have any comments concerning its actual usability? > > Thanks, > > Terry > > > >___ >Tutor maillist - Tutor@python.org >http://mail.python.org/mailman/listinfo/tutor > > if you don't mind KDE, eric is really cool. I run gnome, but i use eric because of things like syntax error checking, etc.. i really dig it sk ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] IDEs
Matt Williams wrote: >I've used both PyDev and Wing IDE. > >PyDev seems good, and is getting better. >Wing is pay-for (although only $40 or so), but can be trialled. I thought >it was good, but had a huge problem trying to get it to play with a C library >I was using... > >I've never managed to get Boa-Constructor to run... > >As regards using wxPython - I thought it was ok, but frankly Glade was s >much easier.. > >(all IMHO) > >Matt > >___ >Tutor maillist - Tutor@python.org >http://mail.python.org/mailman/listinfo/tutor > > > Yup, exactly why i use glade! sk ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] pychart and debian
Hey there, anyone have luck getting pychart installed on debian ? there is no debian package for it (that i have found thus far) and i need something that will allow me to place some simple x, y plots on a chart in pygtk. if any of you have a better solution, i am not completely sold out to pychart. i know that there are others out there. thanks sk ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] pychart and debian
Danny Yoo wrote: >On Sun, 18 Sep 2005, nephish wrote: > > > >>anyone have luck getting pychart installed on debian ? there is no >>debian package for it (that i have found thus far) and i need something >>that will allow me to place some simple x, y plots on a chart in pygtk. >> >> > >Hi sk, > >Ah, found it. It's in the 'testing' and 'unstable' branches in Debian: > >http://packages.qa.debian.org/p/python-pychart.html >http://packages.debian.org/unstable/python/python2.3-pychart > >If you're running 'stable', you may want to ask the Debian folks how easy >it is to grab it from 'testing' and install it. > >If you install pychart from source, doing 'python setup.py install' should >be sufficient, as long as you have ghostscript installed on your system. > > >Best of wishes to you! > > > > ok, got the package installed, but it seems to not be working, or the examples are messed up. here is the source from pychart import * theme.get_options() data = [["Jan", 10], ["Feb", 22], ["Mar", 30]] ar = area.T(x_coord = category_coord.T(data, 0), y_range = (0, None), x_axis = axis.X(label="Month"), y_axis = axis.Y(label="Value")) ar.add_plot(bar_plot.T(data = data, label = "Something")) ar.draw() and here is what i get when i run it. from: can't read /var/mail/pychart ./categbar.py: line 16: syntax error near unexpected token `data' ./categbar.py: line 16: `data = [["Jan", 10], ["Feb", 22], ["Mar", 30]]' [EMAIL PROTECTED]:~$ what do you think may be wrong? thanks for your help with the package by the way -sk ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] pychart and debian
Danny Yoo wrote: >>ok, got the package installed, but it seems to not be working, or the >>examples are messed up. >>here is the source >> >>from pychart import * >>theme.get_options() >>data = [["Jan", 10], ["Feb", 22], ["Mar", 30]] >> >>ar = area.T(x_coord = category_coord.T(data, 0), >>y_range = (0, None), >>x_axis = axis.X(label="Month"), >>y_axis = axis.Y(label="Value")) >>ar.add_plot(bar_plot.T(data = data, label = "Something")) >>ar.draw() >> >>and here is what i get when i run it. >> >>from: can't read /var/mail/pychart >> >> > ^^ > >Ah! You're running into an issue with your Unix environment, not Python. > >Unix doesn't care about file names: without any hints, it'll think that >your program is a mere shell script. The error message above means that >'/bin/sh' is trying to interpret your program. That is, it's trying to >run the Unix 'from' command! > >http://www.freebsd.org/cgi/man.cgi?query=from&apropos=0&sektion=0&manpath=FreeBSD+5.4-RELEASE+and+Ports&format=html > >And the subsequent error messages are pretty much '/bin/sh' error >messages. > > >To avoid this problem, try: > >$ python categbar.py > >Alternatively, make sure the first line in your Python program contains >the "magic" line: > >#!/usr/bin/env python > >to tell the Unix (or Linux) kernel that the program you're running is >meant to be run through Python. > > > > yup, the examples did not have the #!/usr/bin/python line. i have been at python for about 5 months now. How did i miss this? thanks sk ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] problem with matplot
hey there, anyone have any luck getting up and running with matplot-lib on debian? from the website, i followed the instructions to get it with apt. but something is messed up in the dependencies. i get this import pylab Traceback (most recent call last): File "", line 1, in -toplevel- import pylab File "/usr/lib/python2.3/site-packages/pylab.py", line 1, in -toplevel- from matplotlib.pylab import * File "/usr/lib/python2.3/site-packages/matplotlib/pylab.py", line 198, in -toplevel- from axes import Axes, PolarAxes File "/usr/lib/python2.3/site-packages/matplotlib/axes.py", line 13, in -toplevel- from artist import Artist, setp File "/usr/lib/python2.3/site-packages/matplotlib/artist.py", line 4, in -toplevel- from transforms import identity_transform File "/usr/lib/python2.3/site-packages/matplotlib/transforms.py", line 189, in -toplevel- from _transforms import Value, Point, Interval, Bbox, Affine File "/usr/lib/python2.3/site-packages/matplotlib/_transforms.py", line 11, in -toplevel- from matplotlib._nc_transforms import * ImportError: /usr/lib/libstdc++.so.6: version `GLIBCXX_3.4.4' not found (required by /usr/lib/python2.3/site-packages/matplotlib/_nc_transforms.so) i have already installed libstdc++6, and i dont really know what version GLIBCXX_3.4.4 means. anyone have an idea? thanks shawn ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] problem with matplot
Danny Yoo wrote: > > >>anyone have any luck getting up and running with matplot-lib on debian? >>from the website, i followed the instructions to get it with apt. but >>something is messed up in the dependencies. >> >> > >Check with the Debian folks about this one; the problem you're running >into looks really specific to the way Debian has packaged libstdc++6. >This topic isn't really one that folks on Tutor will necessarily have >competence in. Instead, try the debian-python mailing list: > >http://lists.debian.org/debian-python/ > >I did try to Google what was going on, and there's a thread in: > >http://lists.badopi.org/pipermail/comandob/Week-of-Mon-20050801/011594.html > >Unfortunately, I'm not quite sure what they're saying, given that it's not >English. *grin* But I suspect that someone intimate with the Debian >packaging system would know what was going on here. > > > > thanks for the links, i will dig some more, i know this isnt really a python issue, but i thought that since debian is popular, matplot is most peoples recommendation for graphing, and it is for python... figgured i may not be the only one to run into this brick wall. anyway, thanks for your time, maybe an upgrade to 'testing' will help for this package. ok, thanks much. shawn ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] problem with matplot
Danny Yoo wrote: >>>Check with the Debian folks about this one; the problem you're running >>>into looks really specific to the way Debian has packaged libstdc++6. >>>This topic isn't really one that folks on Tutor will necessarily have >>>competence in. Instead, try the debian-python mailing list: >>> >>> http://lists.debian.org/debian-python/ >>> >>> >>> >>thanks for the links, i will dig some more, i know this isnt really a >>python issue, but i thought that since debian is popular, matplot is >>most peoples recommendation for graphing, and it is for python... >> >> > > >True, but let's try to maintain the topical "Learn to program" nature of >the mailing list. I really want to try to avoid turning Tutor into the >"Help with installing package X on system Y" mailing list. We'll try to >help out as best we can on such questions, of course, but this is probably >not the best place to ask this. > >I guess I'm really trying to say: let's try to keep Tutor from turning >into comp.lang.python. *grin* > >>From the Google searches I've done so far, this problem really doesn't >look specific to Python, but basically to anything that links up with the >libstdc++ library on both Debian and Red Hat systems. It's not exclusive >to Python, and since it's so far reaching, I have to assume that it's the >particular Linux distribution's faul... er, responsibility. > > > > he he he. yeah, i admit, i have been breezing over distrowatch. sorry about the clutter. wont happen again. i don't know where i would be without this list. cheers, sk ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] time challange
Hey there, i use mx.DateTime.RelativeDateTimeDiff to get the difference between date_x and date_y. what i need to do divide this amount of time into 20 different times that spaced out between the date_x and the date_y. so if the difference between date_x and date_y is 20 hours, i need 20 DateTimes that are one hour apart from each other. If the difference is 40 minutes, i need the 20 DateTimes to be spaced out 2 minutes from each other.. what would be a way to pull this off? i have looked at the docs for mxDateTime http://www.egenix.com/files/python/mxDateTime.html and there seems to be a divide operation, but i dont quite know what it is talking about with the deltas. anyone have a good start point? thanks shawn ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] time challange
paul brian wrote: >You are fairly close > > > >>>>t1 = today() >>>>t1 >>>> >>>> > > > >>>>t2 = today() + RelativeDateTime(hours=20) >>>>t2 >>>> >>>> > > > >>>>t3 = t2 - t1 >>>>t3.hours >>>> >>>> >20.0 > > >>>>slice = t3/20 >>>>slice >>>> >>>> > > >t3 is a "Delta" - that is an abstract representation >of time - it is not the 20 hours since midnight, just 20 hours >at any time in the universe. >slice is just 1/20th of that same abstract time. But because of the munificence >of Marc we can add that abstract hour to a real fixed time (ignoring >Einstein of course) > > > >>>>t1 + slice >>>> >>>> > > >And so that is a "real" datetime 1/20th of the way forward from t1 > >so a simple loop will get you your 20 evenly spaced time periods, >which is what i think you were asking for. > >cheers > > > >On 9/22/05, nephish <[EMAIL PROTECTED]> wrote: > > >>Hey there, >> >>i use mx.DateTime.RelativeDateTimeDiff to get the difference between >>date_x and date_y. >>what i need to do divide this amount of time into 20 different times >>that spaced out between the date_x and the date_y. >> >>so if the difference between date_x and date_y is 20 hours, i need 20 >>DateTimes that are one hour apart from each other. If the difference is >>40 minutes, i need the 20 DateTimes to be spaced out 2 minutes from each >>other.. >> >>what would be a way to pull this off? i have looked at the docs for >>mxDateTime >>http://www.egenix.com/files/python/mxDateTime.html >>and there seems to be a divide operation, but i dont quite know what it >>is talking about >>with the deltas. >> >>anyone have a good start point? >> >>thanks >>shawn >>___ >>Tutor maillist - Tutor@python.org >>http://mail.python.org/mailman/listinfo/tutor >> >> >> > > >-- >-- >Paul Brian >m. 07875 074 534 >t. 0208 352 1741 > > > YES ! that is what i needed. This is great. i think i understand your steps ok, but you lost me with the munificence of Marc. i never got to take physics. All the same, thanks so much shawn ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] question about pychart
Hey there, i have a simple app that plots some numbers sent by a field sensor with respect to time. i am trying to do this in pychart, but the problem is, when the numbers come in, they do so at almost random times. y shows the value sent by the sensor x plots the time that the value came in. what happens is that the plots are spaced evenly throughout the x axis. so it always looks like an even amount of time when most often, it isn't i need a way to make it plot out the x so that when a lot of values come in at close to the same time, it looks more like that on the graph. i looked at the docs where the examples show that this can be done, the example uses a log style to the plot. it looks like this. http://home.gna.org/pychart/examples/scattertest.png mostly the graph on the right my chart shows just a plot of x=datetime y=value, someone have an idea about how i can get more realistic looking values? thanks shawn ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] advice on how to start with urllib
hey there gents, i am looking for a good place to start learning how to read a web page with python and pull out bits of information for an app i am doing for work. i have googled and looked at the docs. i looked at urllib and httplib so i think this a place to kinda start. Does anyone know of a good site with some examples or tutorials for this kind of thing ? thanks ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] advice on how to start with urllib
Thanks a lot, this stuff is pretty easy. i got a couple of things working here. thanks for your help sk On Sun, 2005-10-23 at 13:46 +0100, Christopher Arndt wrote: > nephish schrieb: > > hey there gents, > > i am looking for a good place to start learning how to read a web page > > with python and pull out bits of information for an app i am doing for > > work. i have googled and looked at the docs. i looked at urllib and > > httplib so i think this a place to kinda start. Does anyone know of a > > good site with some examples or tutorials for this kind of thing ? > > The online book "Diving into Python" by Mark Pilgrim has an excellent chapter > on how to download webpages and process them: > > http://diveintopython.org/http_web_services/index.html > > HTH, Chris > ___ > Tutor maillist - Tutor@python.org > http://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] python myspace module?
Hey there Ed, if you pull this off, let us know. i have wanted to do this very thing, but just don't have the time. sk On Tue, 2005-10-25 at 14:24 -0700, Danny Yoo wrote: > > On Tue, 25 Oct 2005, Ed Hotchkiss wrote: > > > looking to write a myspace wrapper/module. what is the best way > > (hopefully using the stdlib not an outside module) to connect to a > > website and (if possible, otherwise ill have to code it?) access forms > > with GET POST blah blah blah ... > > Hi Ed, > > We do have some rudimentary access by using libraries like urllib and > urllib2. Let's look at urllib for the moment: > > http://www.python.org/doc/lib/module-urllib.html > > By default, it send GET queries, but if we pass in a data argument to its > open() function, it can perform a POST. So for really quick-and-dirty > stuff, urllib can do the trick. > > > For anything more sophisticated, we may want to look at some tools like > mechanize: > > http://wwwsearch.sourceforge.net/mechanize/ > > which can help provide the illusion of a stateful session with a web > server. > > > Best of wishes! > > ___ > Tutor maillist - Tutor@python.org > http://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] question about try & except
Hey there, i am writing some (for me) pretty complicated stuff for work that really needs to work. i have looked at exception handling in the Learning Python book. and i am using some try / except statements. the problem is, that even though my script does not crash, i dont know the exact error. is there a parameter that will allow me to use try and except but that will also pring out the traceback statements that python usually does to the terminal? thanks ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] question about try & except
Thanks Hugo,
Now that i know where to look
appreciate your help.
-sk
On Wed, 2005-10-26 at 21:27 -0600, Hugo González Monteverde wrote:
> Yes,
>
> You can catch an error object along with the exception, as in:
>
> try:
> fileo = open("nofile")
> except IOError, e:
> print "Alas...", e
>
> As you see, the error object has a string representation equal wo what
> normally the python interpreter prints...
>
> >>>
> Alas... [Errno 2] No such file or directory: 'nofile'
> >>>
>
>
> Hope it helps. It took me originally a long time to know this trick, as
> it's kinda buried in the docs.
>
> Hugo
>
>
> nephish wrote:
> > Hey there,
> > i am writing some (for me) pretty complicated stuff for work that
> > really needs to work.
> > i have looked at exception handling in the Learning Python book.
> > and i am using some try / except statements.
> > the problem is, that even though my script does not crash, i dont know
> > the exact error.
> > is there a parameter that will allow me to use try and except but that
> > will also pring out the traceback statements that python usually does to
> > the terminal?
> >
> > thanks
> >
> > ___
> > Tutor maillist - Tutor@python.org
> > http://mail.python.org/mailman/listinfo/tutor
> >
___
Tutor maillist - Tutor@python.org
http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] question about try & except
Yeah, cool. i am just starting this part. i am glad i started with python. thanks for the help sk On Wed, 2005-10-26 at 21:32 -0700, w chun wrote: > > i am writing some (for me) pretty complicated stuff for work that > > really needs to work. > > i have looked at exception handling... > > and i am using some try / except statements. > > the problem is, that even though my script does not crash, i dont > > know > > the exact error. > > is there a parameter that will allow me to use try and except but > > that > > will also pring out the traceback statements that python usually does to > > the terminal? > > > exception handling is one of the greatest strengths of Python and > other high-level languages with this feature. it allows the > programmer to anticipate potential problems and perhaps be able to > accept and process them at runtime. > > let's say you have a code block called BLOCK. newbies to Python would > typically do something like this to ensure that errors don't happen: > > try: > BLOCK > except: > pass > > however, this is not the case. if errors *do* happen, they are thrown > away, thus serves no one any good, not the programmer nor the user. > > the best solution is to catch specific exceptions and handle each > case. (sure, and having just one handler for multiple exceptions is > also okay.). one example is hugo's where he catches an IOError > exception and uses the exception instance 'e' to get more info out of > it. > > now if you *don't* know what exceptions may happen, you can do > something similar. it's almost a combination of the above two > handlers: > > try: > BLOCK > except Exception, e: > print 'Caught exception without a specific handler:", e > > this will at least tell you what exception happens in BLOCK, so that > you can modify it to be something like: > > try: > BLOCK > except # handle YourSpecificException code > except Exception, e: > print 'Caught exception without a specfic handler:', e > > once you know the range of exceptions that may happen in BLOCK and > have written handlers for them, you can dispense with the general > catch-all. > > hope this helps! > -- wesley > - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - > "Core Python Programming", Prentice Hall, (c)2006,2001 > http://corepython.com > > wesley.j.chun :: wescpy-at-gmail.com > cyberweb.consulting : silicon valley, ca > http://cyberwebconsulting.com ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] question about serial coms
Hey there, i am developing on a linux computer with the serial module. Now, i already am able to recieve info from a serial RS232 device and process everything ok. What i need to do now is write to the serial device, but i also need to be able to not interrupt the script that is reading from it. I guess my question is, do i have to interrupt the reading script to write to the same RS232 device ? and if so, how do i do that? thanks, shawn ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] question about serial coms
Yeah, i am using pyserial, i think, in debian its called python serial and i use import serial to get things going. Really easy, just wanted to know about this stuff before i start scrambling this like so many eggs. i will not be using two different scripts, but likely two threads in the same script. not sure i really get what select() is all about great link by the way, thanks. shawn On Mon, 2005-11-14 at 12:35 -0600, Hugo González Monteverde wrote: > Hi Nephish, > > Are you using pyserial or rolling your own? Normally you can write and > read to the /dev/ttySXX file at the same time; since they're special > files, not ordinary files, the driver handles that. > > Handling both writing and reading in your program's flow control is a > wholly different matter, though. You might need to use select() to > avoid blocking. > > Are you using two completely different scripts for reding and writing? > > There is some valuable info, if not about python, in the Serial > Programming howto, at: > > http://www.tldp.org/HOWTO/Serial-Programming-HOWTO/ > > > Hugo > > nephish wrote: > > Hey there, > > i am developing on a linux computer with the serial module. Now, i > > already am able to recieve info from a serial RS232 device and process > > everything ok. What i need to do now is write to the serial device, but > > i also need to be able to not interrupt the script that is reading from > > it. > > I guess my question is, do i have to interrupt the reading script to > > write to the same RS232 device ? > > and if so, how do i do that? > > > > thanks, > > shawn > > > > ___ > > Tutor maillist - Tutor@python.org > > http://mail.python.org/mailman/listinfo/tutor > > ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] question about serial coms
well thats encouraging, did you have to do anything special to prevent an error when trying to read or write at the same time ? thanks sk On Tue, 2005-11-15 at 09:29 +1300, Hans Dushanthakumar wrote: > Ive worked on a similar application. I used one thread to read from the > serial port and another one to handle the writes. > > -Original Message- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Hugo González > Monteverde > Sent: Tuesday, 15 November 2005 7:36 a.m. > To: nephish > Cc: tutor > Subject: Re: [Tutor] question about serial coms > > Hi Nephish, > > Are you using pyserial or rolling your own? Normally you can write and read > to the /dev/ttySXX file at the same time; since they're special files, not > ordinary files, the driver handles that. > > Handling both writing and reading in your program's flow control is a wholly > different matter, though. You might need to use select() to avoid blocking. > > Are you using two completely different scripts for reding and writing? > > There is some valuable info, if not about python, in the Serial Programming > howto, at: > > http://www.tldp.org/HOWTO/Serial-Programming-HOWTO/ > > > Hugo > > nephish wrote: > > Hey there, > > i am developing on a linux computer with the serial module. Now, i > > already am able to recieve info from a serial RS232 device and process > > everything ok. What i need to do now is write to the serial device, > > but i also need to be able to not interrupt the script that is reading > > from it. > > I guess my question is, do i have to interrupt the reading script to > > write to the same RS232 device ? > > and if so, how do i do that? > > > > thanks, > > shawn > > > > ___ > > Tutor maillist - Tutor@python.org > > http://mail.python.org/mailman/listinfo/tutor > > > ___ > Tutor maillist - Tutor@python.org > http://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] question about serial coms
ok, lock is something you wrote yourself ? i can't find it in the docs. However, i think i can essentially build the same thing. the serial module i use is pyserial. pyserial.sourceforge.net. the docs are a wee bit on the sparce side. But i think i can pull it off. Thanks for your help. shawn On Tue, 2005-11-15 at 10:58 +1300, Hans Dushanthakumar wrote: > I believe that the drivers take care of that, however, I did use locks to > make sure that there were no conflicts. > > In the listener thread I had something along the lines of: > > Acquire lock > readline() from the ser port > Release lock > > And in the sender thread, > > Acquire lock > send msg over ser port > Release lock > > Cheers > Hans > > -Original Message- > From: nephish [mailto:[EMAIL PROTECTED] > Sent: Tuesday, 15 November 2005 10:47 a.m. > To: Hans Dushanthakumar > Cc: Hugo González Monteverde; tutor > Subject: RE: [Tutor] question about serial coms > > well thats encouraging, did you have to do anything special to prevent an > error when trying to read or write at the same time ? > > thanks > sk > > > On Tue, 2005-11-15 at 09:29 +1300, Hans Dushanthakumar wrote: > > Ive worked on a similar application. I used one thread to read from the > > serial port and another one to handle the writes. > > > > -Original Message- > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > > Behalf Of Hugo González Monteverde > > Sent: Tuesday, 15 November 2005 7:36 a.m. > > To: nephish > > Cc: tutor > > Subject: Re: [Tutor] question about serial coms > > > > Hi Nephish, > > > > Are you using pyserial or rolling your own? Normally you can write and read > > to the /dev/ttySXX file at the same time; since they're special files, not > > ordinary files, the driver handles that. > > > > Handling both writing and reading in your program's flow control is a > > wholly different matter, though. You might need to use select() to avoid > > blocking. > > > > Are you using two completely different scripts for reding and writing? > > > > There is some valuable info, if not about python, in the Serial Programming > > howto, at: > > > > http://www.tldp.org/HOWTO/Serial-Programming-HOWTO/ > > > > > > Hugo > > > > nephish wrote: > > > Hey there, > > > i am developing on a linux computer with the serial module. Now, i > > > already am able to recieve info from a serial RS232 device and > > > process everything ok. What i need to do now is write to the serial > > > device, but i also need to be able to not interrupt the script that > > > is reading from it. > > > I guess my question is, do i have to interrupt the reading script > > > to write to the same RS232 device ? > > > and if so, how do i do that? > > > > > > thanks, > > > shawn > > > > > > ___ > > > Tutor maillist - Tutor@python.org > > > http://mail.python.org/mailman/listinfo/tutor > > > > > ___ > > Tutor maillist - Tutor@python.org > > http://mail.python.org/mailman/listinfo/tutor > ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] question about serial coms
ok, i think i got it. Thanks so much. let you know how it turns out. shawn On Tue, 2005-11-15 at 11:27 +1300, Hans Dushanthakumar wrote: > Lock() is provided by the threading module. > see > http://docs.python.org/lib/module-threading.html > & > http://docs.python.org/lib/lock-objects.html > > Cheers > Hans > > > -Original Message- > From: nephish [mailto:[EMAIL PROTECTED] > Sent: Tuesday, 15 November 2005 11:23 a.m. > To: Hans Dushanthakumar > Cc: Hugo González Monteverde; tutor > Subject: RE: [Tutor] question about serial coms > > ok, lock is something you wrote yourself ? > i can't find it in the docs. However, i think i can essentially build the > same thing. > the serial module i use is pyserial. pyserial.sourceforge.net. > the docs are a wee bit on the sparce side. But i think i can pull it off. > Thanks for your help. > > shawn > > > On Tue, 2005-11-15 at 10:58 +1300, Hans Dushanthakumar wrote: > > I believe that the drivers take care of that, however, I did use locks to > > make sure that there were no conflicts. > > > > In the listener thread I had something along the lines of: > > > > Acquire lock > > readline() from the ser port > > Release lock > > > > And in the sender thread, > > > > Acquire lock > > send msg over ser port > > Release lock > > > > Cheers > > Hans > > > > -Original Message- > > From: nephish [mailto:[EMAIL PROTECTED] > > Sent: Tuesday, 15 November 2005 10:47 a.m. > > To: Hans Dushanthakumar > > Cc: Hugo González Monteverde; tutor > > Subject: RE: [Tutor] question about serial coms > > > > well thats encouraging, did you have to do anything special to prevent an > > error when trying to read or write at the same time ? > > > > thanks > > sk > > > > > > On Tue, 2005-11-15 at 09:29 +1300, Hans Dushanthakumar wrote: > > > Ive worked on a similar application. I used one thread to read from the > > > serial port and another one to handle the writes. > > > > > > -Original Message- > > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > > > Behalf Of Hugo González Monteverde > > > Sent: Tuesday, 15 November 2005 7:36 a.m. > > > To: nephish > > > Cc: tutor > > > Subject: Re: [Tutor] question about serial coms > > > > > > Hi Nephish, > > > > > > Are you using pyserial or rolling your own? Normally you can write and > > > read to the /dev/ttySXX file at the same time; since they're special > > > files, not ordinary files, the driver handles that. > > > > > > Handling both writing and reading in your program's flow control is a > > > wholly different matter, though. You might need to use select() to > > > avoid blocking. > > > > > > Are you using two completely different scripts for reding and writing? > > > > > > There is some valuable info, if not about python, in the Serial > > > Programming howto, at: > > > > > > http://www.tldp.org/HOWTO/Serial-Programming-HOWTO/ > > > > > > > > > Hugo > > > > > > nephish wrote: > > > > Hey there, > > > > i am developing on a linux computer with the serial module. > > > > Now, > > > > i already am able to recieve info from a serial RS232 device and > > > > process everything ok. What i need to do now is write to the > > > > serial device, but i also need to be able to not interrupt the > > > > script that is reading from it. > > > > I guess my question is, do i have to interrupt the reading > > > > script > > > > to write to the same RS232 device ? > > > > and if so, how do i do that? > > > > > > > > thanks, > > > > shawn > > > > > > > > ___ > > > > Tutor maillist - Tutor@python.org > > > > http://mail.python.org/mailman/listinfo/tutor > > > > > > > ___ > > > Tutor maillist - Tutor@python.org > > > http://mail.python.org/mailman/listinfo/tutor > > > ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] question about serial coms
oh yeah, i will need this too!
sk
On Mon, 2005-11-14 at 17:04 -0800, Bennett, Joe wrote:
> I have been working with pyserial. One question I have
> is this. I have a loop that writes to the serial port
> and then waits about 500ms and then reads from the
> serial port. The first thing read from the serial port
> is ALWAYS the data written to the serial port... I
> must be missing something obvious, but I thuoght the
> two buffers were separate...
>
> Here is the code I'm using if that helps:
>
> while i == 0:
> line = parmfile.readline()
> line = string.rstrip(line)
> #print line
> if line == "":
> i = 1
> break
>
> else:
>
> ser.write(line + "\r")
> #ser.write("\r\n")
> print "Sending: " + line
>
>
>
> time.sleep(1)
> data_in = ser.read(100)
> print "Response: " + data_in
> time.sleep(.2)
>
>
> print "Closing Serial Port\n"
> ser.close()
>
>
>
> -Joe
>
>
> --- nephish <[EMAIL PROTECTED]> wrote:
>
> > ok, i think i got it. Thanks so much.
> > let you know how it turns out.
> > shawn
> >
> >
> > On Tue, 2005-11-15 at 11:27 +1300, Hans
> > Dushanthakumar wrote:
> > > Lock() is provided by the threading module.
> > > see
> > > http://docs.python.org/lib/module-threading.html
> > > &
> > > http://docs.python.org/lib/lock-objects.html
> > >
> > > Cheers
> > > Hans
> > >
> > >
> > > -Original Message-
> > > From: nephish [mailto:[EMAIL PROTECTED]
> > > Sent: Tuesday, 15 November 2005 11:23 a.m.
> > > To: Hans Dushanthakumar
> > > Cc: Hugo González Monteverde; tutor
> > > Subject: RE: [Tutor] question about serial coms
> > >
> > > ok, lock is something you wrote yourself ?
> > > i can't find it in the docs. However, i think i
> > can essentially build the same thing.
> > > the serial module i use is pyserial.
> > pyserial.sourceforge.net.
> > > the docs are a wee bit on the sparce side. But i
> > think i can pull it off. Thanks for your help.
> > >
> > > shawn
> > >
> > >
> > > On Tue, 2005-11-15 at 10:58 +1300, Hans
> > Dushanthakumar wrote:
> > > > I believe that the drivers take care of that,
> > however, I did use locks to make sure that there
> > were no conflicts.
> > > >
> > > > In the listener thread I had something along the
> > lines of:
> > > >
> > > > Acquire lock
> > > > readline() from the ser port
> > > > Release lock
> > > >
> > > > And in the sender thread,
> > > >
> > > > Acquire lock
> > > > send msg over ser port
> > > > Release lock
> > > >
> > > > Cheers
> > > > Hans
> > > >
> > > > -Original Message-
> > > > From: nephish [mailto:[EMAIL PROTECTED]
> > > > Sent: Tuesday, 15 November 2005 10:47 a.m.
> > > > To: Hans Dushanthakumar
> > > > Cc: Hugo González Monteverde; tutor
> > > > Subject: RE: [Tutor] question about serial coms
> > > >
> > > > well thats encouraging, did you have to do
> > anything special to prevent an error when trying to
> > read or write at the same time ?
> > > >
> > > > thanks
> > > > sk
> > > >
> > > >
> > > > On Tue, 2005-11-15 at 09:29 +1300, Hans
> > Dushanthakumar wrote:
> > > > > Ive worked on a similar application. I used
> > one thread to read from the serial port and another
> > one to handle the writes.
> > > > >
> > > > > -Original Message-
> > > > > From: [EMAIL PROTECTED]
> > [mailto:[EMAIL PROTECTED] On
> > > > > Behalf Of Hugo González Monteverde
> > > > > Sent: Tuesday, 15 November 2005 7:36 a.m.
> > > > > To: nephish
> > > > > Cc: tutor
> > > > > Subject: Re: [Tutor] question about serial
> > coms
> > > > >
> > > > > Hi Nephish,
> > > > >
> > > > > Are you using pyserial or rolling your own?
> > Normally you can write and read to the /dev/ttySXX
> > file at the same time; since they're special files,
> > not ordinary files, the driver handles that.
> > > > &
[Tutor] question about ord
Hey there, i am using a script to change a byte into an integer like this: a = the byte value = ord(a) but i cant find the operation that can change it back to a byte. i am sure its easy, but i am missing how to do it. thanks for any tips sk ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] question about ord
Thanks for all your help and the link,
looking at the docs right now.
slaute`
shawn
On Wed, 2005-11-16 at 10:05 +1300, Liam Clarke-Hutchinson wrote:
> Hmm,
>
> Never thought of doing it that way.
>
> try -
>
> import struct
>
> a = theByte
> value = ord(a)
> theByteReloaded = struct.pack("i",value)
>
> You nmay want to check the docs for the struct module at python.org on that
> pattern.
>
>
> Liam Clarke-Hutchinson
>
>
> -Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf
> Of nephish
> Sent: Wednesday, 16 November 2005 9:46 a.m.
> To: tutor
> Subject: [Tutor] question about ord
>
>
> Hey there,
> i am using a script to change a byte into an integer
> like this:
> a = the byte
> value = ord(a)
>
> but i cant find the operation that can change it back to a byte. i am sure
> its easy, but i am missing how to do it.
>
> thanks for any tips
>
> sk
>
> ___
> Tutor maillist - Tutor@python.org
> http://mail.python.org/mailman/listinfo/tutor
>
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[Tutor] whats the best command to end a program
Hey there, what would be the best command to end a program with. i have an app that i want to start every day at 6am from cron but i want it to shutdown at 4pm i was going to check by time on every loop if int(time.strftime(%H)) > 4: some end the program command else: continue what would be best used here ? ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] whats the best command to end a program
right, greater > 16 was what i ment.
he he
it is not a gui.
is raise SystemExit built in ?
thanks gents
sk
On Tue, 2005-12-06 at 21:49 +, Alan Gauld wrote:
> > what would be the best command to end a program with.
>
> If its Tkinter (or another GuI) there will be a quit command
> somewhere. Call that to ensure that the GUI framework gets
> tidied up properly.
>
> For normal programs
>
> import sys; sys.exit()
>
> You can pass an exit code to the outdside world as
> a parameter to exit too.
>
> or just
>
> raise SystemExit
>
> will work.
>
> > i have an app that i want to start every day at 6am from cron
> > but i want it to shutdown at 4pm
>
> OK, here you probably want system.exit(n) with a proper error
> code so that cron can tell if it worked or not...
>
> BTW strftime('%H') returns the hour in 24 hour format so you
> will want to check for 16 not 4...
>
> Alan G
> Author of the learn to program web tutor
> http://www.freenetpages.co.uk/hp/alan.gauld
>
>
___
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[Tutor] dont understand this error MySQLdb
hey there, i am using the MySQLdb module and i keep getting this error, it doesnt offer much in the way of explanation _mysql_exceptions.InterfaceError: (0, '') does anyone know what this means ? thanks ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Learning books
Learning Python by O'Reilly, got me started after realizing that Programming Python by O'Reilly was a tad over me head. i am new here too. On Tue, 2005-12-20 at 14:46 -0600, Richard wrote: > Afternoon all, My son asked me what books I would like for Christmas > this year. So what would you recommend? > > I am a beginner here. > > > Thanks > > > Richard > ___ > Tutor maillist - Tutor@python.org > http://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] How to call mysqlcommand in Python , "mysqldump for backup "
ooh ooh, i know this one, i have python do this for me every day !
target_dir = '/path/to/where/you/want/to/dump'
os.system("mysqldump --add-drop-table -c -u user -ppassword database
table > "+target_dir+"/table.bak.sql")
dont forget the p in front of your password !
hope this helps
On Tue, 2005-12-27 at 13:07 +, John Joseph wrote:
> Hi
> I am trying to execute some MySQL commands using
> some python scripts
> I want to do a “mysqldump” of my database “john” to
> a file backup.date.sql
> the normal command to take a dump is
> mysqldump john> backup.sql
>
> I tried python , by importing
> “import os”
> but I am stuck in how to call “mysqldump” in
> python and execute it
> Help and guidance requested
>Thanks
> Joseph
>
>
>
>
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Re: [Tutor] How to call mysqlcommand in Python , "mysqldump for backup "
Glad to help, glad you got it working too.!
shawn
On Wed, 2005-12-28 at 09:03 +, John Joseph wrote:
> --- nephish <[EMAIL PROTECTED]> wrote:
>
> > ooh ooh, i know this one, i have python do this for
> > me every day !
> >
> > target_dir = '/path/to/where/you/want/to/dump'
> >
> > os.system("mysqldump --add-drop-table -c -u user
> > -ppassword database
> > table > "+target_dir+"/table.bak.sql")
> >
> > dont forget the p in front of your password !
> >
> > hope this helps
> >
> >
>
> Hi it helped me a lot ,
> I did my script like this for backing my zabbix
> database
>
> import os, time
> # difine the target directory
> target_dir = '/home/john/backup/z-b-weekly/zabbix'
>
> # in the formar year-month-day-hours-minute-secound
> # uses time module
> today = time.strftime('%Y-%m-%d-%H-%M-%S')
>
> # For testing purpose only I had kept %M %S , we can
> remove it later
> now = target_dir + today
>
> os.system("mysqldump -u root -pjohn zabbix >
> "+now+" " )
> Thanks A LOT
> Joseph
>
>
>
>
>
>
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[Tutor] quick question about threads
Hey there, i have a program written in python that uses four threads that run all at the same time. Now i want to add a new thread with the same basic structure (threading.thread) that will run only when needed. This one will not run in a loop, it will just run once and quit. So, i may need this to be running several times at once because it will have a 15 second delay written into it. My question is, after the script is done, will it be safe ? i mean, over the course of a few days, it may run this thing a few hundred times. if it is simple like this threading.thread print 'here is something to say' time.sleep(15) print 'here is something else' do i need to include a special command to kill the thread, or will it just finish and everything will be ok then ? thanks for any tips. shawn ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] quick question about threads
all i needed to know, thanks very much shawn On Tue, 2006-01-17 at 21:53 -0500, Kent Johnson wrote: > nephish wrote: > > Hey there, i have a program written in python that uses four threads > > that run all at the same time. Now i want to add a new thread with the > > same basic structure (threading.thread) that will run only when needed. > > This one will not run in a loop, it will just run once and quit. > > So, i may need this to be running several times at once because it will > > have a 15 second delay written into it. > > My question is, after the script is done, will it be safe ? i mean, over > > the course of a few days, it may run this thing a few hundred times. if > > it is simple like this > > > > threading.thread > > print 'here is something to say' > > time.sleep(15) > > print 'here is something else' > > > > do i need to include a special command to kill the thread, or will it > > just finish and everything will be ok then ? > > Assuming you are showing the run() method of your thread above, it > should be fine. If the run() method exits the thread terminates and you > don't have to worry about it any more. Make sure you don't keep any > references to the threads so they can be garbage-collected. > > Kent > > ___ > Tutor maillist - Tutor@python.org > http://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] question about ascii and bytes
ok, so i have sparce documentation from a server that i need to make a
socket connection with.
the server wants to get info a certain way. Each message has to start
with an ascii "STX" (literally the three letters, not the standart ascii
'STX') then it has to have another four bytes that give the length of
the message, then the message itself, then end with an ascii "ENX"
(again,the three letters, not the ascii character "ETX" ).
So here is where the biggest gap in my understanding is... how do i send
ascii characters ?
the docs say that if the password is not 24 bytes long, the other bytes
must be filled with null values. How do i do that ? What is a null
value?
python strings are ascii already , right ? would this be as simple as
simply passing the string to the socket.send('pythonAsciiString') ?
thanks for any tips or links for documentation .
sk
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[Tutor] stuck again - socket connection
ok, i am stuck again. from the docs, the byte stream is supposed to look like this: 'S' 'T' 'X' [length indicator] [message type] [message] 'E' 'N' 'X' the length indicator it says is a four byte integer number of a value N ( N would be how long the message body is ) the message type comes from a table in the docs. In my case, the message type is 200. This is also supposed to be sent as a 4 byte value. so. how do i make 200 occupy 4 bytes ? ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] stuck again - socket connection
Yeah, looking over it right now as a point of fact. thanks. Looks like exactly what i need. cheers shawn On Tue, 2006-02-07 at 10:43 -0800, Danny Yoo wrote: > > > from the docs, the byte stream is supposed to look like this: > > > [problem cut] > > > > so. how do i make 200 occupy 4 bytes ? > > > Hi Nephish, > > Have you had a chance to look at the 'struct' module yet? > > http://www.python.org/doc/lib/module-struct.html > ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] nutshell review
lo there, i know this comes up from time to time. i am considering buying 'python in a nutshell'. All the reviews i have read for it are very good. But it only covers up to python 2.2. i use 2.3 at work, and tinker with 2.4 at home. As good a reference as it is, is it too dated to be that good still ? i have 'Learning Python' and 'Programming Python'. Learning is awesome for me, Programming is a bit over my head. any suggestions? ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] nutshell review
thanks man, ill check out cookbook & see what its all about, too. sk On Thu, 2006-02-09 at 22:22 -0400, Andre Roberge wrote: > On 2/9/06, nephish <[EMAIL PROTECTED]> wrote: > > lo there, > > i know this comes up from time to time. i am considering buying 'python > > in a nutshell'. All the reviews i have read for it are very good. But it > > only covers up to python 2.2. i use 2.3 at work, and tinker with 2.4 at > > home. As good a reference as it is, is it too dated to be that good > > still ? i have 'Learning Python' and 'Programming Python'. Learning is > > awesome for me, Programming is a bit over my head. > > any suggestions? > > > I own about 10 Python books including Learning Python, Programming > Python and Python in a Nutshell. Of these three, Python in a Nutshell > is the one I find the most useful. The Python Cookbook (2nd ed) is my > other favourite. Your mileage may vary... > > André ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] nutshell review
Sounds like its worth the wait. thanks all. shawn On Thu, 2006-02-09 at 19:02 -0800, Terry Carroll wrote: > On Fri, 10 Feb 2006, nephish wrote: > > > i know this comes up from time to time. i am considering buying 'python > > in a nutshell'. All the reviews i have read for it are very good. But it > > only covers up to python 2.2. i use 2.3 at work, and tinker with 2.4 at > > home. As good a reference as it is, is it too dated to be that good > > still ? > > No, it's not too dated. I still use it constantly as my main reference. > When I know a facility is post-2.2, I use the online docs instead. But my > preference is definitely for the Nutshell. Alex explains things > extraordinarily well, in my opinion. The book is well-organized > and well-indexed, so you can find things pretty easily. > > Two thumbs up, from here. > > > i have 'Learning Python' and 'Programming Python'. Learning is > > awesome for me, Programming is a bit over my head. > > That tracks my feelings. I don't find "Programming Python" to be very > useful. It's not the sort of reference book that, say, "Programming Perl" > occupies on the Perl world. My own take on PP is that you can't open it > up to a discussion of a particular feature and understand that feature > without understanding a lot of other things having nothing to do with the > feature, but that are implicit in the explanations and examples. (But I > hasten to add, I've seen enough people swear how much they love that book, > that this may just be idiosyncratic to me.) > > I think a good Python *reference* book is invaluable to any Python > programmer. And to me, that book is Python in a Nutshell. > > There are a couple others that are good, too: > > The Python 2.1 Bible - 2.1, obviously; I don't know if there's a later > version; > > > The Complete Python Reference - published 2001, so bound to be a bit > dated) > > Python Essential Reference - When I first started playing with Python, a > library copy of this was my reference. I liked it, but I like the > Nutshell just a little better, but that may be a matter of familiarity. > If you're going for this one, I'd suggest waiting another couple of weeks. > The Third Edition is coming out February 24, which means it will be the > most current Python reference book, when published. I would be surprised > if it didn't cover through 2.4. > > > ___ > Tutor maillist - Tutor@python.org > http://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] nutshell review
yeah, one of the guys that posted earlier mentioned late feb as a release of the new one. i think i am going to go ahead and get the cookbook now, and then pick up the new nutshell later. sk On Fri, 2006-02-10 at 09:56 -0600, [EMAIL PROTECTED] wrote: > Isn't there supposed to be a new edition of the Nutshell book coming > out? I was kinda hanging back for that one... > Carl Badgley > ___ > Tutor maillist - Tutor@python.org > http://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
