Re: File read-write mode: problem appending after reading

[Frederic Rentsch]

Tim Peters wrote:
> [Frederic Rentsch]
>   
>>   Thanks a lot for your input. I seemed to notice that  everything
>> works fine without setting the cursor as long as it stops before the end
>> of the file. Is that also a coincidence that may not work?
>> 
>
> "if you want to read following a write, or write following a read, on
> the same stream, you must perform a file-positioning operation
> (typically a seek) between them"
>   
I appreciate the clarification. Thanks!
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command text parsing and hints displaying on user input.

[Andy]

Hi guys,

I'm writing a program with a feature of accepting user input as command
text and parsing it to correct function calls...example:

"5 minutes later"/"5 min later"/"5 minute later"/"after 5 minutes"...
are being parsed as the same rule so the system will call a later
function with minutes=5 as parameter.

Of course there are many other possiblilities, "seconds"/"days", and
even "every(each) hour"/"every Monday"/"every two days"...so on...

The datetime computation can be done with the wonderful "dateutil"
package, but I'm not sure with the command text parsing part. I could
do a lot of regular expression, but it'll be great if there is already
something similar available...or even a hint that can make it easier
than hand-writing a lot of regular expression code...

Another requirment is to display useful hints when user input the
command text. Example:

user input:"5" -> hints: "5 minutes later/5 hours later/5 days
later/every 5 minutes"
user input:"fi" -> hints: "next Friday"/"first thing tommorrow"
user input:"ne" -> hints: "next day"/"next hour"/"next week"/"next
month"

Sounds too intelligent to do? Any advices on this?

Thanks guys.

Andy

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Re: How to send E-mail without an external SMTP server ?

[Leo Kislov]

On Oct 15, 10:25 pm, "[EMAIL PROTECTED]" <[EMAIL PROTECTED]>
wrote:
> Hi,
>
> I just want to send a very simple email from within python.
>
> I think the standard module of smtpd in python can do this, but I
> haven't found documents about how to use it after googleing. Are there
> any examples of using smtpd ? I'm not an expert,so I need some examples
> to learn how to use it.

smtpd is for relaying mail not for sending. What you need it a dns
toolkit (search cheeseshop) to map domain name to list of incoming mail
servers, and then using stdlib smtplib try to submit the message to
them.

> Or maybe there is a better way to to this?

This won't work if you're behind a strict corporate firewall or if ISP
is blocking port 25 outgoing connections. In those cases you _have_ to
use an external mail server.

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Re: OT: What's up with the starship?

[rurpy]

George Sakkis wrote:
> [EMAIL PROTECTED] wrote:
> > Robert Hicks wrote:
> > > [EMAIL PROTECTED] wrote:
> > > > T. Bryan wrote:
> > > > > starship.python.net was compromised.  It looked like a rootkit may 
> > > > > have been
> > > > > installed.  The volunteer admins are in the process of reinstalling 
> > > > > the OS
> > > > > and rebuilding the system.  That process will probably take a few 
> > > > > days at
> > > > > least.
> > > >
> > > > Does anyone know more?
> > > >
> > > > What about the integrity of the python packages hosted there?
> > > > When was the site compromised?
> > > > I just installed the python 2.5 pywin module last week.
> > > > Should I be concerned?
> > > >
> > > > Is this related to the Python security problem recently announced?
> > >
> > > Did you even read about the vulnerability?
> >
> > Yes.  Do you have any answers, or do you just enjoy posting irrevelant
> > responses?
>
> I guess his response implied that what's irrelevant here is the
> vulnerability, and accordingly your worries about it.

Then perhaps he should have said that, in which case I would
have explained why he did not understand what he read.  Let me
try again...

1. A site which hosts (I think, hence the questions) a number
of high profile, popular python projects was compomised.
2. It was compromised with a root kit which by their nature,
often go undetected for a long time.
3. It is common for miscreants to attempt to introduce
backdoors into software that will be widely distributed.
4. Anyone downloading and installing such trojaned software
will also be compromised.
5. Verifying that such a thing has not happened can be very
difficult, particularly if the date and other details of the
compromise cannot be accurately determined.
6. Many organisations give image and pr a higher priority
than the safety of their customers/users and wave off security
breechs with "don't worry, everything is fine.  We're sure
nothing has been touched" when in fact they have no idea.
7. I have seen no public statements or information about
this leading me to wonder about the stuation and how it's
being handled, hence my seeking of further information.

That's what I am concerned about, ok?
I don't really care how the site was compromised and my
question about the python security vunerability was curiosity.

But, I am still completely at a loss why you, he, or anyone,
based on the information presented so far,.would conclude
that the python security problem is unrelated.
Care to enlighten me?
But more inmportantly, how about addressing my original
questions which are, even if you do not think so, pretty
important for anyone who has recently downloaded software
from or built there.

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Re: How to send E-mail without an external SMTP server ?

[[EMAIL PROTECTED]]

Rob Wolfe wrote:
> [EMAIL PROTECTED] wrote:
>   
>> Hi,
>>
>> I just want to send a very simple email from within python.
>>
>> I think the standard module of smtpd in python can do this, but I
>> haven't found documents about how to use it after googleing. Are there
>> any examples of using smtpd ? I'm not an expert,so I need some examples
>> to learn how to use it.
>> 
>
> See standard documentation:
>
> http://docs.python.org/lib/SMTP-example.html
>
> HTH,
> Rob
>
>   

I have read the example and copied the code and save as send.py, then I 
run it. Here is the output:
$ python send.py
From: [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Enter message, end with ^D (Unix) or ^Z (Windows):
just a test from localhost
Message length is 82
send: 'ehlo [202.127.19.74]\r\n'
reply: '250-WebMail\r\n'
reply: '250 AUTH plain\r\n'
reply: retcode (250); Msg: WebMail
AUTH plain
send: 'mail FROM:<[EMAIL PROTECTED]>\r\n'
reply: '502 negative vibes\r\n'
reply: retcode (502); Msg: negative vibes
send: 'rset\r\n'
reply: '502 negative vibes\r\n'
reply: retcode (502); Msg: negative vibes
Traceback (most recent call last):
 File "send.py", line 26, in ?
   server.sendmail(fromaddr, toaddrs, msg)
 File "/usr/lib/python2.4/smtplib.py", line 680, in sendmail
   raise SMTPSenderRefused(code, resp, from_addr)
smtplib.SMTPSenderRefused: (502, 'negative vibes', '[EMAIL PROTECTED]')


Do I have to setup a smtp server on my localhost ?

Thanks a lot.

xiaojf

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Re: How to send E-mail without an external SMTP server ?

[Rob Wolfe]

[EMAIL PROTECTED] wrote:

> Do I have to setup a smtp server on my localhost ?

If I see correctly your smtp server is gmail.com.

HTH,
Rob

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Re: How to send E-mail without an external SMTP server ?

[Leo Kislov]

On Oct 16, 12:31 am, "[EMAIL PROTECTED]" <[EMAIL PROTECTED]>
wrote:
> Rob Wolfe wrote:
> > [EMAIL PROTECTED] wrote:
>
> >> Hi,
>
> >> I just want to send a very simple email from within python.
>
> >> I think the standard module of smtpd in python can do this, but I
> >> haven't found documents about how to use it after googleing. Are there
> >> any examples of using smtpd ? I'm not an expert,so I need some examples
> >> to learn how to use it.
>
> > See standard documentation:
>
> >http://docs.python.org/lib/SMTP-example.html
>
> > HTH,
> > RobI have read the example and copied the code and save as send.py, then I
> run it. Here is the output:
> $ python send.py
> From: [EMAIL PROTECTED]
> To: [EMAIL PROTECTED]
> Enter message, end with ^D (Unix) or ^Z (Windows):
> just a test from localhost
> Message length is 82
> send: 'ehlo [202.127.19.74]\r\n'
> reply: '250-WebMail\r\n'
> reply: '250 AUTH plain\r\n'
> reply: retcode (250); Msg: WebMail
> AUTH plain
> send: 'mail FROM:<[EMAIL PROTECTED]>\r\n'
> reply: '502 negative vibes\r\n'
> reply: retcode (502); Msg: negative vibes
> send: 'rset\r\n'
> reply: '502 negative vibes\r\n'
> reply: retcode (502); Msg: negative vibes
> Traceback (most recent call last):
>  File "send.py", line 26, in ?
>server.sendmail(fromaddr, toaddrs, msg)
>  File "/usr/lib/python2.4/smtplib.py", line 680, in sendmail
>raise SMTPSenderRefused(code, resp, from_addr)
> smtplib.SMTPSenderRefused: (502, 'negative vibes', '[EMAIL PROTECTED]')
>
> Do I have to setup a smtp server on my localhost ?

You need to use login method
. And by the way, the
subject of your message is very confusing, you are posting log where
you're sending email using external server.

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Where to find pydoc?

[Wijaya Edward]

I tried to call pydoc from my Linux box.
To my realization that it doesn't contain
pydoc.
 
I thought this module should be a default module.
 
Can anybody suggest where can I find the module?
I tried:
 
$ easy_install pydoc
Searching for pydoc
Reading http://sqlobject.org/  
Reading http://peak.telecommunity.com/dist  
Reading http://www.python.org/pypi/pydoc/  
Couldn't find index page for 'pydoc' (maybe misspelled?)
Scanning index of all packages (this may take a while)
Reading http://www.python.org/pypi/  
No local packages or download links found for pydoc
error: Could not find suitable distribution for Requirement.parse('pydoc')

 
Hope to hear from you again.
 
Regards,
Edward WIJAYA
SINGAPORE

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use it for any purpose, or disclose its contents to any other person. Thank you.

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Re: IDE that uses an external editor?

[Nick Craig-Wood]

Jorge Godoy <[EMAIL PROTECTED]> wrote:
>  Eclipse: just a GUI over a subset of Emacs today.

;-)

>  One day, when it evolves, it will be something interesting...  I
>  won't give up on Emacs loading fast

I never thought I'd live to see emacs being quoted as loading fast!
It really is fast compared to Eclipse though.

  "E"ight(y) "M"egs "A"nd "C"onstantly "S"wapping

Trouble is is that Eclipse is Eight-Hundred Megs ;-)

This message written in emacs, which I love dearly and have spent the
last 10 years mastering!  I did try Eclipse but I found it too slow
and clunky and there was far too much GUI (I like my whole screen to
be the file I'm editing).

Attempting to bring this discussion back on topic: Emacs has a few
python modes also.  There is the basic python-mode which does
everything expected of a major-mode.  Syntax colouring, indentation
that sort of thing.  There is also IM-Python for code navigation, and
bycycle repair man for refactoring support.  You can run stuff at the
interactive python prompt from within emacs.

-- 
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Re: wx.grid question (trying to use code from Grid_Example.py)

[Nick Craig-Wood]

[EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
>  I am having trouble trying to reuse the code that was provided in the
>  wxdemo package of wxpython.

I suggest you ask this question on the wxpython mailing list which has
lots of very well informed contributors (not me - I'm just learning!).

  http://www.wxpython.org/maillist.php

-- 
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COM and threads

[Teja]

HI all,

I have a problem in accesing COM objects in threads. To be precise,
lets assume that I have a class GenericFunctions which is defined as
follows:

import win32com.client, pythoncom, thread
ie=win32com.client.Dispatch('internetexplorer.application')
ie.Visible=1

class GenericFunctions:

   def __init__(self):
 print "In Constructor of Generic Functions"

   def MyNavigate(self,dest):
 ie.Navigate(dest)


Now there  is another file Main.py which is defined as follows:

import win32com.client, pythoncom, thread
from GenericFunctions import *
obj = GenericFunctions()

class Mainclass:
   def __init__(self);
print "In Constructor of Main class"

   def threadFunction(self,dest):
pythoncom.CoInitialize()
d=pythoncom.CoGetInterfaceAndReleaseStream(s,
pythoncom.IID_IDispatch)
my_ie=win32com.client.Dispatch(d)
obj.func(dest)  # this is gving an error.
pythoncom.CoUninitialize()

if __name__ == "__main__":

s=pythoncom.CoMarshalInterThreadInterfaceInStream(pythoncom.IID_IDispatch,ie)
 thread.start_new_thread(self.nav, (s,'www.google.com')

Basically, I want to access object of GenericFunctions class inside
threadFunction(). However I was able to execute
my_ie.Navigate("google.com"). But that was not I wanted. I am not
knowing where the error is
Please let me know the solution ASAP...

Teja.P

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Re: Attribute error

[Teja]

Max Erickson wrote:
> "Teja" <[EMAIL PROTECTED]> wrote:
>
> > Hi all,
> >
> > What is attribute error? what causes that error, especially with COM
> > objects?
> >
> > To be precise :
> >
> > Attribute Error: LCAS.LabcarController.writeLogWindow()
> >
> > Here, LCAS is a COM object
> >
> > Thanks
> > Teja.P
> >
>
> LabcarController might be a function. See:
>
> http://groups.google.com/group/comp.lang.python/msg/d7341f1aedcae6d3
>
> for more detail.
>
> hope this helps,
> max


HI all,

I have a problem in accesing COM objects in threads. To be precise,
lets assume that I have a class GenericFunctions which is defined as
follows:

import win32com.client, pythoncom, thread
ie=win32com.client.Dispatch('internetexplorer.application')
ie.Visible=1

class GenericFunctions:

   def __init__(self):
 print "In Constructor of Generic Functions"

   def MyNavigate(self,dest):
 ie.Navigate(dest)


Now there  is another file Main.py which is defined as follows:

import win32com.client, pythoncom, thread
from GenericFunctions import *
obj = GenericFunctions()

class Mainclass:
   def __init__(self);
print "In Constructor of Main class"

   def threadFunction(self,dest):
pythoncom.CoInitialize()
d=pythoncom.CoGetInterfaceAndReleaseStream(s,
pythoncom.IID_IDispatch)
my_ie=win32com.client.Dispatch(d)
obj.func(dest)  # this is gving an error.
pythoncom.CoUninitialize()

if __name__ == "__main__":

s=pythoncom.CoMarshalInterThreadInterfaceInStream(pythoncom.IID_IDispatch,ie)
 thread.start_new_thread(self.nav, (s,'www.google.com')

Basically, I want to access object of GenericFunctions class inside
threadFunction(). However I was able to execute
my_ie.Navigate("google.com"). But that was not I wanted. I am not
knowing where the error is
Please let me know the solution ASAP...

Teja.P

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Re: COM error

[Teja]

Neil Cerutti wrote:
> On 2006-10-14, Teja <[EMAIL PROTECTED]> wrote:
> > What is "ValueError: argument is not a COM object" ? I get this
> > error when I try to pass a COM object to a thread.
> >
> > Any pointers
>
> Try passing it to Larry Bird, instead. He's bound to score some
> points.
>
> Seriously, the function you called expected a COM object and you
> passed it something else. Without seeing more code, it's hard to
> be any helpfuller.
>
> --
> Neil Cerutti

HI all,

I have a problem in accesing COM objects in threads. To be precise,
lets assume that I have a class GenericFunctions which is defined as
follows:

import win32com.client, pythoncom, thread
ie=win32com.client.Dispatch('internetexplorer.application')
ie.Visible=1

class GenericFunctions:

   def __init__(self):
 print "In Constructor of Generic Functions"

   def MyNavigate(self,dest):
 ie.Navigate(dest)


Now there  is another file Main.py which is defined as follows:

import win32com.client, pythoncom, thread
from GenericFunctions import *
obj = GenericFunctions()

class Mainclass:
   def __init__(self);
print "In Constructor of Main class"

   def threadFunction(self,dest):
pythoncom.CoInitialize()
d=pythoncom.CoGetInterfaceAndReleaseStream(s,
pythoncom.IID_IDispatch)
my_ie=win32com.client.Dispatch(d)
obj.func(dest)  # this is gving an error.
pythoncom.CoUninitialize()

if __name__ == "__main__":

s=pythoncom.CoMarshalInterThreadInterfaceInStream(pythoncom.IID_IDispatch,ie)
 thread.start_new_thread(self.nav, (s,'www.google.com')

Basically, I want to access object of GenericFunctions class inside
threadFunction(). However I was able to execute
my_ie.Navigate("google.com"). But that was not I wanted. I am not
knowing where the error is
Please let me know the solution ASAP...

Teja.P

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Re: COM and Threads

[Teja]

Teja wrote:
> Roger Upole wrote:
> > "Teja" <[EMAIL PROTECTED]> wrote:
> > >
> > > Roger Upole wrote:
> > >
> > >> "Teja" <[EMAIL PROTECTED]> wrote:
> > >> >
> > >> > Roger Upole wrote:
> > >> >
> > >> >> "Teja" <[EMAIL PROTECTED]> wrote:
> > >> >> >I have an application which uses COM 's Dispatch to create a COM 
> > >> >> >based
> > >> >> > object. Now I need to upgrade the application to a threaded one. But
> > >> >> > its giving an error that COM and threads wont go together. 
> > >> >> > Specifically
> > >> >> > its an attribute error at the point where COM object is invoked. Any
> > >> >> > pointers please??
> > >> >> >
> > >> >>
> > >> >> An actual traceback would help.
> > >> >> At a guess, when using COM in a thread
> > >> >> you need to call pythoncom.CoInitialize and
> > >> >> CoUninitialize yourself.
> > >> >>
> > >> >>  Roger
> > >> >
> > >> > Actually Roger, this is the scenario
> > >> >
> > >> > I create a COM object at the beginnning of the main thread. In the sub
> > >> > thread, I need to access the same instance of the COM object. If it
> > >> > were a normal object ie. not a COM obj, i was able to do it. But if it
> > >> > were a COM object, its giving an attribute error? Should I pass a COM
> > >> > object to the thread. If so How? Please let me know ASAP... Thnks
> > >> >
> > >>
> > >> To pass COM objects between threads, usually they'll need to be marshaled
> > >> using pythoncom.CoMarshalInterThreadInterfaceInStream, and unmarshaled
> > >> with pythoncom.CoGetInterfaceAndReleaseStream.
> > >>
> > >>  Roger
> > >
> > > I really appreciate your quick replyCan u please let me know how to
> > > do marshalling and unmarshalling or any good refrences to do it.
> > > Because i tried to do it. I got some errors ans so I left it...
> > >
> > > Thnks again...
> > >
> >
> > Here's a simple example using Internet Explorer.
> >
> > import win32com.client, pythoncom, thread
> > ie=win32com.client.Dispatch('internetexplorer.application')
> > ie.Visible=1
> >
> > def nav(istream, dest):
> > pythoncom.CoInitialize()
> > d=pythoncom.CoGetInterfaceAndReleaseStream(istream, 
> > pythoncom.IID_IDispatch)
> > my_ie=win32com.client.Dispatch(d)
> > my_ie.Navigate(dest)
> > pythoncom.CoUninitialize()
> >
> > s=pythoncom.CoMarshalInterThreadInterfaceInStream(pythoncom.IID_IDispatch,ie)
> > thread.start_new_thread(nav, (s, 'www.google.com'))
> >
> >   Roger
>
> Thnks a lot Roger, Its working gr8..Now, once the thread is started
> with start_new_thread, is there any way to terminate it upon user's
> request. I have explored and found out that there is no thread.kill().
> So wht to do now?
>
> Teja

HI all,

I have a problem in accesing COM objects in threads. To be precise,
lets assume that I have a class GenericFunctions which is defined as
follows:

import win32com.client, pythoncom, thread
ie=win32com.client.Dispatch('internetexplorer.application')
ie.Visible=1

class GenericFunctions:

   def __init__(self):
 print "In Constructor of Generic Functions"

   def MyNavigate(self,dest):
 ie.Navigate(dest)


Now there  is another file Main.py which is defined as follows:

import win32com.client, pythoncom, thread
from GenericFunctions import *
obj = GenericFunctions()

class Mainclass:
   def __init__(self);
print "In Constructor of Main class"

   def threadFunction(self,dest):
pythoncom.CoInitialize()
d=pythoncom.CoGetInterfaceAndReleaseStream(s,
pythoncom.IID_IDispatch)
my_ie=win32com.client.Dispatch(d)
obj.func(dest)  # this is gving an error.
pythoncom.CoUninitialize()

if __name__ == "__main__":

s=pythoncom.CoMarshalInterThreadInterfaceInStream(pythoncom.IID_IDispatch,ie)
 thread.start_new_thread(self.nav, (s,'www.google.com')

Basically, I want to access object of GenericFunctions class inside
threadFunction(). However I was able to execute
my_ie.Navigate("google.com"). But that was not I wanted. I am not
knowing where the error is
Please let me know the solution ASAP...

Teja.P

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Re: Where to find pydoc?

[Marc 'BlackJack' Rintsch]

In <[EMAIL PROTECTED]>, Wijaya Edward
wrote:

> 
> I tried to call pydoc from my Linux box.
> To my realization that it doesn't contain
> pydoc.
>  
> I thought this module should be a default module.

Yes it is part of the standard library.  What distribution are you using?

Ciao,
Marc 'BlackJack' Rintsch
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RE: Where to find pydoc?

[Wijaya Edward]

Hi,
Thanks for the reply.
 
Red Hat Linux Enterprise:
Linux host.com 2.6.9-34.ELsmp #1 SMP Fri Feb 24 16:54:53 EST 2006 i686 i686 
i386 GNU/Linux

 
Python 2.3.4.
 
Any problem with that?
 
--- Edward



From: [EMAIL PROTECTED] on behalf of Marc 'BlackJack' Rintsch
Sent: Mon 10/16/2006 5:00 PM
To: python-list@python.org
Subject: Re: Where to find pydoc?



In <[EMAIL PROTECTED]>, Wijaya Edward
wrote:

>
> I tried to call pydoc from my Linux box.
> To my realization that it doesn't contain
> pydoc.
> 
> I thought this module should be a default module.

Yes it is part of the standard library.  What distribution are you using?

Ciao,
Marc 'BlackJack' Rintsch
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 Institute For Infocomm Research - Disclaimer -
This email is confidential and may be privileged.  If you are not the intended 
recipient, please delete it and notify us immediately. Please do not copy or 
use it for any purpose, or disclose its contents to any other person. Thank you.

-- 
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Re: How to send E-mail without an external SMTP server ?

[[EMAIL PROTECTED]]

Leo Kislov wrote:
>>
>> Do I have to setup a smtp server on my localhost ?
>> 
>
> You need to use login method
> . And by the way, the
> subject of your message is very confusing, you are posting log where
> you're sending email using external server.
>
>   
Thanks.

Yes, I want to find a way to send email without an external smtp server.

According to Rob's reply, I thought this could be implemented as 
described in
the example code of "SMTP Example" on 
"http://docs.python.org/lib/SMTP-example.html";.  So I tried the code, 
but failed.

Actually I was writing a script that can submit jobs automatically on a 
remote server. I should not submit the jobs all at once, because this 
will take up all resources of the server. I just want a specified number 
of jobs to be running at one time. If one jobs is over, the script 
should submit another job. I run the script with nohup, then I logout.  
The script will take care of all jobs.

But I have to check the status of the script manually, which is very 
inefficient. So I want to be informed automatically by E-mail when all 
jobs are done.


It's not safe if I have to use login method explicitly by which I have 
to put my username and password in the script. I have also tried the 
Unix command 'mail', but without success, either. I could use 'mail' to 
send an E-mail to the user on the server, but I couldn't send an E-mail 
to an external E-mail server. I realized that it may because the port 25 
outgoing connections are blocked, so I gave up. I will have to login 
periodically to check the status of the jobs:-(

Anyway, thank you, Rob, and thank you, Leo.

xiaojf
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Re: Where to find pydoc?

[Fredrik Lundh]

Wijaya Edward wrote:

> Thanks for the reply.
>  
> Red Hat Linux Enterprise:
> Linux host.com 2.6.9-34.ELsmp #1 SMP Fri Feb 24 16:54:53 EST 2006 i686 i686 
> i386 GNU/Linux
> 
> Python 2.3.4.
>  
> Any problem with that?

only that Red Hat obviously hasn't bothered to include "pydoc" in the 
distribution you're using.

look for "python-tools" or a similar package in your favourite package 
repository.



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Re: Ok. This IS homework ...

[Frederic Rentsch]

spawn wrote:
> but I've been struggling with this for far too long and I'm about to
> start beating my head against the wall.
>
> My assignment seemed simple: create a program that will cacluate the
> running total of user inputs until it hits 100.  At 100 it should stop.
>  That's not the problem, in fact, that part works.  It's the adding
> that isn't working.  How can my program add 2 + 7 and come up with 14?
>
> I'm posting my code (so that you may all laugh).  If ANYONE has any
> ideas on what I'm doing wrong, I'd appreciate.
>
> ---
>
> running = True
> goal = 100
>
> # subtotal = 0
> # running_total = subtotal + guess
>
> while running:
>   guess = int(raw_input('Enter an integer that I can use to add : '))
>   subtotal = guess
>
>   while running:
>   guess = int(raw_input('I\'ll need another number : '))
>   running_total = guess + subtotal
>   print running_total
>
>   if running_total == goal:
>   print 'Congratulations!  You\'re done.'
>
>   elif running_total > goal:
>   print 'That\'s a good number, but too high.  Try again.'
>
> print 'Done'
>
> --
>
> I tried adding an additional "while" statement to capture the second
> number, but it didn't seem to solve my problem.  Help!
>
>   
Dear anonymous student,

Once upon a time programmers did things like this:

   BEGIN
 |
  -->|<-
 |   |  |
 |   catch input|
 |   |  |
 |   input type valid? - prompt for correct input --|
 |   +  |
 |input too large? + --- prompt for new input --
 |   -
 |  add to running total 
 |   |
 |  status report 
 |   |
  -- - running total >= max?
 +
report done  
 |
END

It was called a flow chart. Flow charts could be translated directly 
into machine code written in assembly languages which had labels, tests 
and jumps as the only flow-control constructs. When structured 
programming introduced for and while loops they internalized labeling 
and jumping. That was a great convenience. Flow-charting became rather 
obsolete because the one-to-one correspondence between flow chart and 
code was largely lost.
I still find flow charting useful for conceptualizing a system of 
logical states too complex for my intuition. Everybody's intuition has a 
limit. Your homework solution shows that the assignment exceeds yours. 
So my suggestion is that you use the flow chart, like this:


def homework ():

   # Local functions. (I won't do those for you.)

   def explain_rules (): 
   def check_type (r):   
   def explain_type ():
   def check_size (r):
   def explain_max_size ():
   def report_status (rt):
   def report_done ():


   # Main function

   GOAL  = 100   #BEGIN
   MAX_INPUT =  20   #  |
   running_total =   0   #  |
 #  |
   explain_rules ()  #  |
 #  | 
   while 1:  #   
-->|<-
 #  |   
|  |
  response = raw_input ('Enter a number > ') #  |   
catch input|
 #  |   
|  |
  if check_type (response) == False: #  |   input 
type valid? - prompt for correct input --|
 explain_type () #  |   
+  |
 continue#  |   
|  |
 #  |   
|  |
  if check_size (response) == False: #  |input 
too large? + --- prompt for new input --
 explain_max_size () #  |   -
 continue#  |   |
 #  |   |
  running_total += int (response)#  |  add to 
running total 
  report_st

Re: python's OOP question

[Bruno Desthuilliers]

neoedmund wrote:
(*PLEASE* stop top-posting - corrected)
> 
> Ben Finney wrote:
>> [Please don't top-post above the text to which you're replying.]
>>
>> "neoedmund" <[EMAIL PROTECTED]> writes:
>>
>>> I'm trying to achieve a higher level of "reusability". Maybe it
>>> cannot be done in python? Can anybody help me？
>> What, specifically, are you trying to achieve? What problem needs
>> solving?

> python use multiple inheritance.
> but "inheritance" means you must inherite all methods from super type.
> now i just need "some" methods from one type and "some" methods from
> other types, to build the new type.
> Do you think this way is more flexible than tranditional inheritance?

While dynamically adding attributes (and methods - which are attributes
too) is not a problem, I'd second Gregor's anwser : it might be better
to use composition/delegation here.

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Re: Cannot import a module from a variable

[Bruno Desthuilliers]

Jia Lu wrote:
> Hi all:
> 
> I try to do things below:
 import sys
 for i in sys.modules.keys():
>   import i
> Traceback (most recent call last):
>   File "", line 2, in 
> import i
> ImportError: No module named i
> 
> But it seems that import donot know what is i ? 

The import statement expects a name (a symbol), not a string.

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Re: python's OOP question

[neoedmund]

Bruno Desthuilliers wrote:
> neoedmund wrote:
> (*PLEASE* stop top-posting - corrected)
> >
> > Ben Finney wrote:
> >> [Please don't top-post above the text to which you're replying.]
> >>
> >> "neoedmund" <[EMAIL PROTECTED]> writes:
> >>
> >>> I'm trying to achieve a higher level of "reusability". Maybe it
> >>> cannot be done in python? Can anybody help me？
> >> What, specifically, are you trying to achieve? What problem needs
> >> solving?
>
> > python use multiple inheritance.
> > but "inheritance" means you must inherite all methods from super type.
> > now i just need "some" methods from one type and "some" methods from
> > other types, to build the new type.
> > Do you think this way is more flexible than tranditional inheritance?
>
> While dynamically adding attributes (and methods - which are attributes
> too) is not a problem, I'd second Gregor's anwser : it might be better
> to use composition/delegation here.
>

Could you show some code to help me know how composition/delegation can
be done here? Thanks.

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Re: Book about database application development?

[Bruno Desthuilliers]

Wolfgang Keller wrote:
> Hello,
> 
> and thanks for your reply, but...
> 
>> Here's a start:
>>
>> http://philip.greenspun.com/sql/
> 
> ...small misunderstanding: I already know a bit of SQL,

Developping quality SQLDBMS-based applications requires more than "a
bit" of SQL knowledge.

> and I intend to avoid 
> its use as far as possible (and use e.g. Modeling or SQLAlchemy).  

I don't know Modeling, but have a bit of experience with SQLAlchemy, and
without SQL and relational model knowledge, you won't get very far.

> What I'm interested in is rather how to connect a GUI to a database, with 
> quite a bit of application logic in between. And how to do it well.

This is more a general design question than a database-related (or even
Python-related) one. The answer starts with forgetting about
"connect(ing) a GUI to a database" IMHO and experience. Might be time to
google for MVC...


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Re: A friendlier, sugarier lambda -- a proposal for Ruby-like blocks in python

[Bruno Desthuilliers]

Paul Boddie wrote:
> Kay Schluehr wrote:
>> Spreading tiny function definitions all over the code
>> may be finally not such a good idea compared with a few generic methods
>> that get just called? OO might run out of fashion these days but Python
>> is not Java and Pythons OO is pretty lightweight.
> 
> I think you've successfully identified a recent trend in Python
> development: the abandonment of fairly transparent object-oriented
> techniques in favour of more opaque but supposedly more convenient
> hybrid techniques. 

Just for the record : Ruby's code-blocks (closures, really) come from
Smalltalk, which is still the OneTrueObjectLanguage(tm).


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Re: python's OOP question

[Kay Schluehr]

neoedmund wrote:

> Could you show some code to help me know how composition/delegation can
> be done here? Thanks.

Starting with your example C2 might just derive from C1 and perform a
supercall:

class C1(object):
def v(self, o):
return "expected "+o


class C2(C1):
def v(self, o):
return "unexpected "+o
def m(self):
print super(C2,self).v("aaa")

>>> c2 = C2()
>>> c2.m()
expected aaa

But in general there is no single pattern to deal with object
composition.

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Re: A friendlier, sugarier lambda -- a proposal for Ruby-like blocks in python

[Kay Schluehr]

Bruno Desthuilliers wrote:

> Just for the record : Ruby's code-blocks (closures, really) come from
> Smalltalk, which is still the OneTrueObjectLanguage(tm).

IsTheOneTrueObjectLanguage(tm)ReallyCamelCased?

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Re: sufficiently pythonic code for testing type of function

[Bruno Desthuilliers]

Fredrik Lundh wrote:
> Scott David Daniels wrote:
> 
>> Nope.  idempotent: f(f(x)) = f(x)
>> That is, after doing it once, repeating it won't hurt.
> 
> http://en.wikipedia.org/wiki/Idempotence_%28computer_science%29
> 
> 
> 
Thank you (Scott and Fredrik) for the correction.

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Re: How to send E-mail without an external SMTP server ?

[Leo Kislov]

On Oct 16, 2:04 am, "[EMAIL PROTECTED]" <[EMAIL PROTECTED]>
wrote:
> It's not safe if I have to use login method explicitly by which I have
> to put my username and password in the script. I have also tried the
> Unix command 'mail', but without success, either. I could use 'mail' to
> send an E-mail to the user on the server, but I couldn't send an E-mail
> to an external E-mail server. I realized that it may because the port 25
> outgoing connections are blocked, so I gave up. I will have to login
> periodically to check the status of the jobs:-(

Using username password is safe as long as you trust system admin, you
just need to make your script readable only to you. Or even better put
the username and password in a separate file. There is also a way to
limit damage in case you don't trust admin, you just need to get auth
token. Start smtp session and set debug level(True), use login method
and see the token:

send: 'AUTH PLAIN \r\n'
reply: '235 2.7.0 Accepted\r\n'
reply: retcode (235); Msg: 2.7.0 Accepted

Then put the token in a file readable only to you, and from now on
instead of login() method use docmd('AUTH PLAIN',"). If the token is stolen, the thief can only send mail from your
account but won't be able to login with password.

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Re: Book about database application development?

[Paul Rubin]

Wolfgang Keller <[EMAIL PROTECTED]> writes:
> > http://philip.greenspun.com/sql/
> 
> ...small misunderstanding: I already know a bit of SQL, and I intend to avoid 
> its use as far as possible (and use e.g. Modeling or SQLAlchemy).  

I'm not sure what you mean, that book isn't just an intro to SQL, it
discusses how to tune for performance, etc.  It has quite a bit of
practical advice that you can tell came from hard-won experience by
the author.  On the other hand, it's somewhat out of date by now and
it's Oracle-centered.  Anyway it's online, you might spend a minute
looking at it to see if it's useful to you.  It had sounded like the
type of thing you're asking for.

> What I'm interested in is rather how to connect a GUI to a database, with 
> quite a bit of application logic in between. And how to do it well.

Erm, I can't really tell what you're asking for here; the application
simply makes database queries as needed.  
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Re: OT: What's up with the starship?

[micahel]

[EMAIL PROTECTED] wrote:
> Then perhaps he should have said that, in which case I would
> have explained why he did not understand what he read.  Let me
> try again...

Well, let's have some answers then.

> 1. A site which hosts (I think, hence the questions) a number
> of high profile, popular python projects was compomised.

Yes.  However, it doesn't *seem* as if the machine was deliberately
targeted, and I think it's unlikely the attackers were interested in
trojanning software.  But of course the machine was rooted, so it's
pretty hard to be sure of these things.

> 2. It was compromised with a root kit which by their nature,
> often go undetected for a long time.

As far as I can tell, the machine was compromised on 2006-09-02.

Irritatingly we didn't find out until just after logrotate had deleted
the logs for around the time of the attack.

It wasn't a very subtle rootkit -- installing a version of netstat with
different command line options, for example...

> 5. Verifying that such a thing has not happened can be very
> difficult, particularly if the date and other details of the
> compromise cannot be accurately determined.

I guess you should find out from the author of whatever you downloaded
what the checksums should have been for what you downloaded and check
that against what you downloaded.

If you don't still have the downloaded files, I can tell you what the
md5's of the files in the back up are.

> 6. Many organisations give image and pr a higher priority
> than the safety of their customers/users and wave off security
> breechs with "don't worry, everything is fine.  We're sure
> nothing has been touched" when in fact they have no idea.

There is no organization behind python.net.

I am a volunteer.  I help run python.net in my spare time.

> 7. I have seen no public statements or information about
> this leading me to wonder about the stuation and how it's
> being handled, hence my seeking of further information.

I'm sorry, I'm busy trying to get the server going again.

> But, I am still completely at a loss why you, he, or anyone,
> based on the information presented so far,.would conclude
> that the python security problem is unrelated.

Why would it be?  For all it's position in the community, there aren't
actually many python web apps running on python.net, certainly not as
root...

Cheers,
mwh

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Re: run subprocess in separate window

[[EMAIL PROTECTED]]

Radek a écrit :

> Hi,
>
> I am trying to create GUI launcher of several applications using Python
> and Tkinter.
>
> Currently when using subprocess.Popen("mycommand") all output goes to
> the stdout of my launcher.
>
> For some command line applications I need to launch them so that their
> output goes into the separate "terminal" window.
>
> How can I make it?
>
> Thanks,
>
> Radek

Hello, have a look at the subprocess module, it might help you get to
what you want.

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Re: Where can I find good python code?

[kdart]

I think the following is a package with a lot of good code. But then,
I'm biased. ;-)

http://code.google.com/p/pynms/


On Oct 13, 9:08 am, "js " <[EMAIL PROTECTED]> wrote:
>  Hi,
>
> I've learned basics of Python and want to go to the next step.
> So I'm looking for good python examples
> I steal good techniques from.
>
> I found Python distribution itself contains some examples in Demo directory.
> I spent some time to read them and
> I think they're good but seemed not so practical to me.
> 
> Any recommendations?

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Re: Ok. This IS homework ...

[Nick Craig-Wood]

Frederic Rentsch <[EMAIL PROTECTED]> wrote:
>  It was called a flow chart. Flow charts could be translated directly 
>  into machine code written in assembly languages which had labels, tests 
>  and jumps as the only flow-control constructs. When structured 
>  programming introduced for and while loops they internalized labeling 
>  and jumping. That was a great convenience. Flow-charting became rather 
>  obsolete because the one-to-one correspondence between flow chart and 
>  code was largely lost.

The trouble with flow charts is that they aren't appropriate maps for
the modern computing language territory.

I was born and bred on flow charts and I admit they were useful back
in the days when I wrote 1000s of lines of assembler code a week.

Now-a-days a much better map for the the territory is pseudo-code.
Python is pretty much executable pseudo-code anway!

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EXCITING OPPORTUNITY FOR EXPERIENCED APPLICATION DEVELOPERS (PYTHON)

[Azri]

EXCITING OPPORTUNITY FOR EXPERIENCED APPLICATION DEVELOPERS (PYTHON)

Azri Solutions Pvt Limited ( http://www.azri.de/en/) provides a
challenging work environment, an open work culture & competitive
remuneration : the right ingredients to facilitate superlative
performance.Vacancies for Experienced Application Developers (PYTHON)
are currently open. Azri is an extremely flexible & sustainable
networked enterprise with presence in Germany, the U.S.A. & India. Our
team has intense hands-on experience in designing, deploying and
managing high-volume Service-Oriented Architectures (SOA) including
RDBMS-backed Webservices. In most cases, we leverage tried and tested
open-source software.

Join our highly motivated and dedicated team to embark upon a
challenging and rewarding career where you get to make decisions,
create great products and in the process, have some fun! We believe in
the concept of continuous learning, taking on responsibilities and
providing growth opportunities for every team member. Our environment
encourages innovation. Ideas are welcome and every individual is
empowered to think, share and take ownership oftheir ideas and
creations.

MAIL YOUR RESUME TO [EMAIL PROTECTED]

JOB DESCRIPTION :

· General : Should have developed applications using Open Source
systems.
· Scripting : TCL, PHP, Perl, Python, Ruby.
· Languages : C, C++ development experience is an added advantage.
· OS : Linux / Unix, Windows. (Must have Linux / Unix experience).
· Frameworks : Should have used Open Source languages like PHP /
Perl/Ruby / TCL and frameworks like Drupal / Mojave / Rails / OpenACS.

DESIRED PROFILE :

· Should enjoy programming.
· Experience : One to four years' programming experience.
· Knowledge of Linux, Shell scripting, Web application development,
Quality software development.
· Excellent conceptual, analytical and programming skills.
· Should have Application Design experience.
· Familiarity with Open Source Application Development.
· Familiarity with Open Source Web Application Frameworks.
· Participation in open source communities is an added advantage.

SOFTSKILLS :

 · Good communication and interpersonal skills.
· Team player.

LOCATION : HYDERABAD

MAIL YOUR RESUME TO [EMAIL PROTECTED]

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Re: classroom constraint satisfaction problem

[[EMAIL PROTECTED]]

Steven Bethard a écrit :

> I'm trying to solve a constraint-satisfaction problem, and I'm having
> some troubles framing my problem in such a way that it can be
> efficiently solved.
>
> Basically, I want to build groups of two teachers and four students such
> that [1]:
>
> * Students are assigned to exactly one group
> * Teachers are assigned to approximately the same number of groups
> * Students are not in groups with their homeroom teachers
> * Students in each group are from four different homerooms
>
> So given teachers A, B, C, D, E and F and their corresponding students
> A1, A2, ... F3, F4, here's a good grouping:
>
> A, B:   C1, D1, E1, F1
> B, C:   A1, D2, E2, F2
> C, D:   A2, B1, E3, F3
> D, E:   A3, B2, C2, F4
> E, F:   A4, B3, C3, D3
> F, A:   B4, C4, D4, E4
>
>
> My current solution is to create a constraint satisfaction problem using
> python-constraint (http://labix.org/python-constraint) where there are

Last time I looked at it, it seemed to not use (by default) its Arc8
routine that prunes domains between each variable instantiation by the
backtracker. Did you enable it ? (it should have a crucial performance
impact).

You could also try the logilab constraint package
(http://www.logilab.org/projects/constraint) and see how it fares with
your problem (it 'only' provides the AC3 domain pruning algorithm but
at least uses it by default).

Cheers,
Aurélien.

> variables for:
>
> * each student  domain: group names
> * each group name   domain: all pairs of teachers
>
> This works for simple problems, but because most of my constraints have
> to iterate over all students and/or all groups, this takes way too long
> on my real dataset (which has 300+ students).  I thought about trying to
> reframe the problem so that there are variables for:
>
> * each group name   domain: pairs of teachers X 4-tuples of students
>
> but that seems like it would be generating something like 15^2*300^4
> items for the domain, which is clearly also going to be way too big.
>
>
> Any suggestions on how to speed things up?  I've posted my current code_
> and the tests_ in case anyone has the time to look at them.
>
> .. _code: http://ucsu.colorado.edu/~bethard/py/constraint/student_groups.py
> .. _tests:
> http://ucsu.colorado.edu/~bethard/py/constraint/test_student_groups.py
>
>
> Thanks!
>
> Steve
>
>
> [1] There are actually two other constraints that I omitted:
>
> * Some teachers cannot be placed in the same group, e.g. I might know
> that A cannot work with B or that E cannot work with F.
>
> * If you create a graph out of the teacher pairs from all the groups,
> the graph should not be disconnected.  That is, the following grouping
> is bad because the teachers are disconnected:
>
> A, B: ...
> C, D: ...
> A, B: ...
>
> while this grouping would be okay:
> 
> A, B: ...
> B, C: ...
> C, D: ...

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New Software Development Articles Directory

[editormt]

A new links directory of articles related to software development is
"under construction" on http://www.softdevarticles.com/

Please feel free use it in future research and to contribute with your
articles on python.

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Re: IDE that uses an external editor?

[Jorge Godoy]

Nick Craig-Wood <[EMAIL PROTECTED]> writes:

> Attempting to bring this discussion back on topic: Emacs has a few
> python modes also.  There is the basic python-mode which does
> everything expected of a major-mode.  Syntax colouring, indentation
> that sort of thing.  There is also IM-Python for code navigation, and
> bycycle repair man for refactoring support.  You can run stuff at the
> interactive python prompt from within emacs.

Besides, even though PyDev's indentation got a little better it isn't as smart
as Emacs'.  Being a language where indentation matters, I find Emacs much more
productive and this only feature is a major problem to "migrate" from Emacs to
Eclipse. 

But, who knows when Eclipse gets better it will have the power needed to
implement the same set of indentation rules...

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Re: Book about database application development?

[Wolfgang Keller]

>> What I'm interested in is rather how to connect a GUI to a database, with
>> quite a bit of application logic in between. And how to do it well.
> 
> You've described Dabo perfectly. Have you looked into it yet? It's
> written by a couple of database application developers.

Yes, thanks, I know about Dabo. As I know about Kiwi, Thyme, GNUe, TinyERP 
and so on...

But I would still like to learn how to do things myself if I need to.

Sincerely,

Wolfgang Keller

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Convert StringIO to string

[Jonathan Bowlas]

Hi listers,

I've written this little script to generate some html but I cannot get it to
convert to a string so I can perform a replace() on the >, <
characters that get returned.

from StringIO import StringIO

def generator_file(rsspath,titleintro,tickeropt): 
scripter=StringIO()
scripter.write('\n')
scripter.write('new rss_ticker(%s, %s, %s)\n' % (rsspath,
titleintro, tickeropt))
scripter.write('\n')
return scripter.getvalue()

I tried adding this:

scripter = scripter.replace("<", "<")
scripter = scripter.replace(">", ">")

But obviously replace() isn't an attribute of StringIO so I guess I need to
convert it to a string first, can someone please advise how I can do this?

Cheers

Jon


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Re: EXCITING OPPORTUNITY FOR EXPERIENCED APPLICATION DEVELOPERS (PYTHON)

[beliavsky]

If the company is so good, why does it hire recruiters like you?

It is rude to SHOUT your subject in all caps.

Your subject conveys nothing more than "Python job offered".

You should have mentioned in the subject that the job is in Hyderabad,
because even most readers of this group looking for jobs are probably
unwilling to relocate there, and thus they could skip the rest of the
message.

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Re: Convert StringIO to string

[skryskalla]

Jonathan Bowlas wrote:
> But obviously replace() isn't an attribute of StringIO so I guess I need to
> convert it to a string first, can someone please advise how I can do this?

StringIO objects are file-like objects, so you need to use read or
readlines to get the string data out of it (just like a regular file).
Before reading remember to seek back to the beginning to get all of the
data ("Be kind, rewind!"):

>>> import StringIO
>>> s = StringIO.StringIO()
>>> s.write("hello world\n")
>>> s.seek(0)
>>> s.read()
'hello world\n'

>>> s = StringIO.StringIO()
>>> s.write("hello world\n")
>>> s.read()
''

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Re: python's OOP question

[Bruno Desthuilliers]

neoedmund wrote:
> Bruno Desthuilliers wrote:
>> neoedmund wrote:
>> (*PLEASE* stop top-posting - corrected)
>>> Ben Finney wrote:
 [Please don't top-post above the text to which you're replying.]

 "neoedmund" <[EMAIL PROTECTED]> writes:

> I'm trying to achieve a higher level of "reusability". Maybe it
> cannot be done in python? Can anybody help me？
 What, specifically, are you trying to achieve? What problem needs
 solving?
>>> python use multiple inheritance.
>>> but "inheritance" means you must inherite all methods from super type.
>>> now i just need "some" methods from one type and "some" methods from
>>> other types, to build the new type.
>>> Do you think this way is more flexible than tranditional inheritance?
>>>
>> While dynamically adding attributes (and methods - which are attributes
>> too) is not a problem, I'd second Gregor's anwser : it might be better
>> to use composition/delegation here.
>> 
> Could you show some code to help me know how composition/delegation can
> be done here? Thanks.

About composition/delegation, there's no "one-size-fits-all" answer, but
the main idea is to use the magic '__getattr__(self, name)' method.

Now back to your specific case : after a better reading of your original
question, straight composition/delegation wouldn't work here - at least
not without modifications to both C1 and C2 (sorry, should have read
better the first time).

Given the context (ie : "create a new type with methods from type X and
methods from type Y"), a very simple solution could be:

class C3(object):
m = C2.m.im_func
v = C1.v.im_func

FWIW, if you have full control over C1, C2 and C3, you could also just
'externalize' the functions definitions:

def v1(self, o):
return "expected "+o

def v2(self, o):
return "unexpected "+o

def m2(self):
""" requires that 'self' has a v(self, somestring) method """
print self.v("aaa")

class C1(object):
v = v1

class C2(object):
v = v2
m = m2

class C3(object):
v = v1
m = m2


The problem (with the whole approach, whatever the choosen technical
solution) is that if one of theses methods depends on another one (or on
any other attribute) that is not defined in your new class, you're in
trouble. This is not such a big deal in the above example, but might
become much more brittle in real life.

Now we can look at the problem from a different perspective. You wrote:
"""
but "inheritance" means you must inherite all methods from super type.
now i just need "some" methods from one type and "some" methods from
other types, to build the new type.
"""

What is your problem with having the other extra methods too ?

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p in '[EMAIL PROTECTED]'.split('@')])"
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RE: Convert StringIO to string

[Jonathan Bowlas]

Ahh thanks, I'll give that a try.

-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
[EMAIL PROTECTED]
Sent: 16 October 2006 14:00
To: python-list@python.org
Subject: Re: Convert StringIO to string

Jonathan Bowlas wrote:
> But obviously replace() isn't an attribute of StringIO so I guess I need
to
> convert it to a string first, can someone please advise how I can do this?

StringIO objects are file-like objects, so you need to use read or
readlines to get the string data out of it (just like a regular file).
Before reading remember to seek back to the beginning to get all of the
data ("Be kind, rewind!"):

>>> import StringIO
>>> s = StringIO.StringIO()
>>> s.write("hello world\n")
>>> s.seek(0)
>>> s.read()
'hello world\n'

>>> s = StringIO.StringIO()
>>> s.write("hello world\n")
>>> s.read()
''

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Re: Convert StringIO to string

[paul]

Jonathan Bowlas schrieb:
> Hi listers,
> 
> I've written this little script to generate some html but I cannot get it to
> convert to a string so I can perform a replace() on the >, <
> characters that get returned.
> 
> from StringIO import StringIO
> 
> def generator_file(rsspath,titleintro,tickeropt): 
>   scripter=StringIO()
>   scripter.write('\n')
>   scripter.write('new rss_ticker(%s, %s, %s)\n' % (rsspath,
> titleintro, tickeropt))
>   scripter.write('\n')
>   return scripter.getvalue()
> 
> I tried adding this:
> 
> scripter = scripter.replace("<", "<")
> scripter = scripter.replace(">", ">")
I'm not sure why you are using a StringIO instance here, but the
standard library has all you need:

from StringIO import StringIO
from xml.sax.saxutils import escape, unescape

def generator_file(rsspath, titleintro, tickeropts):
  #unescape your strings first
  rsspath, titleintro, tickeropts = map(unescape, [rsspath, titleintro,
tickeropts])
  scripter=StringIO()
  scripter.write('\n')
  scripter.write('new rss_ticker(%s, %s, %s)\n' % (rsspath, titleintro,
tickeropt))
  scripter.write('\n')
  return scripter.getvalue()

I'm still curious what all this StringIO stuff is for ;)

cheers
 Paul



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Re: Convert StringIO to string

[Brian Quinlan]

Jonathan Bowlas wrote:
> Ahh thanks, I'll give that a try.
> 
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of
> [EMAIL PROTECTED]
> Sent: 16 October 2006 14:00
> To: python-list@python.org
> Subject: Re: Convert StringIO to string
> 
> Jonathan Bowlas wrote:
>> But obviously replace() isn't an attribute of StringIO so I guess I need
> to
>> convert it to a string first, can someone please advise how I can do this?
> 
> StringIO objects are file-like objects, so you need to use read or
> readlines to get the string data out of it (just like a regular file).
> Before reading remember to seek back to the beginning to get all of the
> data ("Be kind, rewind!"):
> 
 import StringIO
 s = StringIO.StringIO()
 s.write("hello world\n")
 s.seek(0)
 s.read()
> 'hello world\n'

Or, instead of seak/read, just do

 >>> s.getvalue()

Cheers,
Brian


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comparing Unicode and string

[[EMAIL PROTECTED]]

Hello,

here is something that surprises me.

  #coding: iso-8859-1
  s1=u"Frau Müller machte große Augen"
  s2="Frau Müller machte große Augen"
  if s1 == s2:
  pass

Running this code produces a UnicodeDecodeError:

Traceback (most recent call last):
  File "tmp.py", line 4, in ?
if s1 == s2:
UnicodeDecodeError: 'ascii' codec can't decode byte 0xfc in position 6:
ordinal not in range(128)

I would have expected that "s1 == s2" gives True... or maybe False...
but raising an error here is unnecessary. I guess that the comparison
operator decides to convert s2 to a Unicode but forgets that I said
#coding: iso-8859-1 at the beginning of the file.

TIA for any comments.

Luc Saffre

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Re: Convert StringIO to string

[Rob Williscroft]

Jonathan Bowlas wrote in
news:[EMAIL PROTECTED] in
comp.lang.python: 

> Hi listers,
> 
> I've written this little script to generate some html but I cannot get
> it to convert to a string so I can perform a replace() on the >,
> < characters that get returned.
> 
> from StringIO import StringIO
> 
> def generator_file(rsspath,titleintro,tickeropt): 
>  scripter=StringIO()
>  scripter.write('\n')
>  scripter.write('new rss_ticker(%s, %s, %s)\n' % (rsspath,
> titleintro, tickeropt))
>  scripter.write('\n')
>  return scripter.getvalue()
> 
> I tried adding this:
> 
> scripter = scripter.replace("<", "<")
> scripter = scripter.replace(">", ">")
> 
> But obviously replace() isn't an attribute of StringIO so I guess I
> need to convert it to a string first, can someone please advise how I
> can do this? 
> 

How strange, you are already "converting" to a string in the return
line (the call to the getvalue() method), so:

scripter = scripter.getvalue().replace("<", "<")
scripter = scripter.replace(">", ">")
return scripter

should do what you want.

Rob.
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Re: wx.grid question (trying to use code from Grid_Example.py)

[paul]

[EMAIL PROTECTED] schrieb:
> To extend and revise my remarks my error is
> 
>  File "C:\Python24\Lib\site-packages\boa-constructor\test of
> snake\csoundgrid.py", line 8, in create_grid
> win = Grid_MegaExample.MegaTable(self, data, colnames, pugins)
> NameError: global name 'self' is not defined
> Script terminated.
This has nothing to do with wx, you just don't use "self" if you're
_calling_ a method. So:

def create_grid():
win = Grid_MegaExample.MegaTable(data, colnames, pugins)
win.Show(True)

should get you to the next error ;)

cheers
 paul

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RE: Convert StringIO to string

[Jonathan Bowlas]

Ok, I think I'm explaining
this badly because I've used getvalue() in the script I originally submitted to
the list, see below:

 

from StringIO import
StringIO

 

def
generator_file(rsspath,titleintro,tickeropt): 

  scripter=StringIO()

  scripter.write('\n')


  scripter.write('new
rss_ticker(%s, %s, %s)\n' % (rsspath, titleintro, tickeropt))

  scripter.write('\n')

  return
scripter.getvalue()

 

 

The problem is this script
returns the following:

 



 

And I want to replace the
< and > characters for < or > so it actually renders
correctly in a browser so I'm returned this:

 



new rss_ticker(www.bbc.co.uk,
True, True) 

 

So what am I doing wrong?

 

J

 






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