Re: [Tutor] A better way for greatest common divisor
On Fri, Jul 30, 2010 at 11:47 AM, David Hutto wrote:
> This is basically to get feedback, on a better way to show the
> greatest common divisor in fraction, in order to reduce it fully, than
> the one I've come up with. I'm sure there are better ways, so if you
> have simpler method, or critique of what I've done, let me know.
[snip]
I have a far simpler solution:
>>> from tools import gcd
>>> gcd(20, 5)
5
>>>
def gcd(a, b):
while b != 0:
(a, b) = (b, a%b)
return a
cheers
James
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--
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Re: [Tutor] A better way for greatest common divisor
On Fri, Jul 30, 2010 at 12:10 PM, James Mills wrote: > def gcd(a, b): > while b != 0: > (a, b) = (b, a%b) > return a Here's another solution that uses a generator called factors to generate a list of factors for any given value. The gcd function then uses sets and intersection and the max function to find the greatest common factor/divisor http://codepad.org/VJIRyvI8 cheers James -- -- James Mills -- -- "Problems are solved by method" ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] A better way for greatest common divisor
On Fri, Jul 30, 2010 at 12:22 PM, Richard D. Moores wrote: > On Thu, Jul 29, 2010 at 19:10, James Mills > wrote: >> On Fri, Jul 30, 2010 at 11:47 AM, David Hutto wrote: >>> This is basically to get feedback, on a better way to show the >>> greatest common divisor in fraction, in order to reduce it fully, than >>> the one I've come up with. I'm sure there are better ways, so if you >>> have simpler method, or critique of what I've done, let me know. >> >> [snip] >> >> I have a far simpler solution: >> >>>>> from tools import gcd >>>>> gcd(20, 5) >> 5 > > In Python 3.1 that would be >>>> from fractions import gcd >>>> gcd(20,5) > 5 Yes. The code I provided above was code I wrote for various Euler problems I had been working on a whiel back. It was written for 2.x cheers James -- -- James Mills -- -- "Problems are solved by method" ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] how to get str() to use my function?
On Thu, Aug 5, 2010 at 12:37 AM, Alex Hall wrote: > Hi all, > I have a card class. A card object simply consists of a pair of > numbers; 0,0 might be the ace of clubs, for example. I have a toString > method in my card class. Is there a way to just say str(card) instead > of card.toString()? Maybe some sort of basic, built-in function to > override? TIA. Oh, what about doing the same with operators? For > example, could I get the program to call my own math functions when it > sees a card object in a math expression, like > if(card1==card2) implement a __str__ method. For example: $ python Python 2.6.5 (r265:79063, Jun 13 2010, 14:03:16) [GCC 4.4.4 (CRUX)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> class Foo(object): ... def __str__(self): ... return "" ... >>> foo = Foo() >>> foo <__main__.Foo object at 0x83d796c> >>> str(foo) '' >>> cheers James -- -- James Mills -- -- "Problems are solved by method" ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] string to list
On Thu, Aug 5, 2010 at 2:38 PM, Vikram K wrote:
> Suppose i have this string:
> z = 'AT/CG'
>
> How do i get this list:
>
> zlist = ['A','T/C','G']
>>> import re
>>> z = 'AT/CG'
>>> [x for x in re.split("([A-Z]\/[A-Z])|([A-Z])", z) if x]
['A', 'T/C', 'G']
>>>
cheers
James
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Re: [Tutor] modify csv textfile
On Sat, Aug 7, 2010 at 12:35 PM, TGW wrote:
> I have a pipe delimited text file with 5 columns which looks like this:
> 12345|some text|some more text|example125 oo3 3456|example32423
> 11223|more text|and more|example/73d 77665|example455667
> 12677|text|more|anotherexample 123|anotherexample45
>
> What I want to output is:
> 12345|some text|some more text|example|example32423
> 11223|more text|and more|example|example455667
> ...
> 12677|text|more|anotherexample 123|anotherexample45
>
> So column 4 is where the change occurs, but only if the beginning of the
> string in column 4 =~ /^example/i # and it should be case insensitive
So do it :)
> #!/usr/bin/env python
> import csv
> import re
>
> filename = raw_input("Enter the filename to edit: ")
>
> reader = csv.reader(open(filename, 'rb'), delimiter='|',
> quoting=csv.QUOTE_NONE)
> for row in reader:
> print row
>
>
> I can print the file, I just need a little help searching and replacing
the column 4 data element.
Use re.match to match the column.
Use csv.writer to write our a new csv file
based on the one you're reading, filtering
and modifying.
cheers
James
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Re: [Tutor] a graceful program exit
On Thu, Aug 12, 2010 at 1:42 PM, Bill Allen wrote: > I have only learned a couple of ways to cause a Python program to exit: > sys.exit(0) & raise.SystemExit . I am using this in a try/except block. > Which is preferred? Are there other, better ways? The normal pattern is to have an entry point and an exit point. main() and SystemExit exception. cheers James -- -- James Mills -- -- "Problems are solved by method" ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] continuous running of a method
On Mon, Aug 23, 2010 at 3:00 PM, Greg Bair wrote: > I have a method (I'll call it foo) that will either return None or an object > depending on a random value generated. What I want to happen is that if I > call foo(), i.e, f = foo() and it returns None, to re-call it until it > returns something else. I would think this would be done with a while loop, > but can't seem to get the details right. > > Any help would be greatly appreciated. Quite simple really, and yes you are right. Use a while loop: >>> from random import seed, random >>> from time import time >>> seed(time()) >>> def foo(): ... if 0.5 < random() < 0.6: ... return True ... >>> x = foo() >>> while x is None: ... x = foo() ... >>> x True >>> cheers James -- -- James Mills -- -- "Problems are solved by method" ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] SSH session problems with network devices
On Fri, Aug 27, 2010 at 2:54 AM, wrote: > My Paramiko code works correctly when connecting with a Linux system. But > when I connect with a router, the connection is dropped immediately after a > command is exectued, so it isn't possible to send a sequence of interrelated > commands. What Router is this ? What OS does it run ? I may have some experience with this as I often ssh into various networking devices including Linux servers and systems, etc... cheers James -- -- James Mills -- -- "Problems are solved by method" ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] SSH session problems with network devices
On Fri, Aug 27, 2010 at 8:42 AM, wrote: > > I'm running tests on - Cisco IOS Software, s72033_rp Software > (s72033_rp-ADVIPSERVICESK9_WAN-M), Version 12.2 > > It's running SSHv2.0 > > My solution should be portable to other vendor/models. Can you "normally" ssh into your Cisco routers and be presented with a shell of some kind ? cheers James PS: Please post to the list. -- -- James Mills -- -- "Problems are solved by method" ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] SSH session problems with network devices
On Fri, Aug 27, 2010 at 9:13 AM, wrote: > > Yes. No problem. The point is that I have Python programs that normally > access these devices by telnet to complex tasks. I have to find a way to use > SSH to replace the telnet in my code. I actually have no experience with Cisco devices, but the question that remains to be seen really is; "Why are your Cisco devices terminating the SSH connection after the first command ?" This actually might be a terminal or some kind of configuration issue (if you can normally ssh into your Cisco devices and get a prompt/terminal). Ssh'ing and executing remote commands might be interpreted differently by the Cisco ssh/shell/etc. It might be worth your while looking into this as it'll have nothing at all to do with Python or Paramiko.. cheers James -- -- James Mills -- -- "Problems are solved by method" ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] input problem
On Tue, Sep 14, 2010 at 6:45 AM, ANKUR AGGARWAL wrote:
> Suppose i am taking input or various variables like
> a=raw_input("...") //hello
> b=raw_input("")//hi
> c=raw_input("...")//hello
> d=raw_input("..")//hello
> but i want to run a common function when input is hello
> so instead of
> if a=="hello":
> fun()
> then again for b and then again for c then d and so on i have to apply the
> code for the specific variable ,
> i want to run the function whenever in the code input is "hello"
> i am wondering is there is any way like
> if input=="hello":
> fun()
> i hope you get my point.. Help me out please
> Thanks in advance
How about this design pattern:
def hello():
print "Hello World!"
prompt = "..."
s = raw_input(prompt)
while s:
if s == "hello":
hello()
elif s == "quit":
break
s = raw_input(prompt)
cheers
James
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Re: [Tutor] If/elif/else when a list is empty
On Tue, Sep 14, 2010 at 1:58 PM, wrote: > rgenre = re.split(r';', rf.info["genre"]) # When movies have genre First question. Why are you not using an XML parser (it looks like your IMDB data files _are_ XML). e.g: elementree (in the standard library). > else len(rgenre)<1: # I was hoping this would take care of the "there is > no genre information" scenario but it doesn't > rg1=rg2=rg3="NA" the "else" statement does not expect (nor accept) an expression after it, just write: else: ... cheers James -- -- James Mills -- -- "Problems are solved by method" ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] If/elif/else when a list is empty
On Tue, Sep 14, 2010 at 2:46 PM, wrote: > rgenre = re.split(r';', rf.info["genre"]) > KeyError: 'genre' Use something like this: if "genre" in rf.info: rgenre = re.split(..., ...) else: # ... no genre cheers James -- -- James Mills -- -- "Problems are solved by method" ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] FW: wierd replace problem
On Tue, Sep 14, 2010 at 5:28 PM, Roelof Wobben wrote:
> Strip ('"'') does not work.
> Still this message : SyntaxError: EOL while scanning string literal
>
> So I think I go for the suggestion of Bob en develop a programm which deletes
> all the ' and " by scanning it character by character.
I seriously don't understand why you're having so much trouble with this
and why this thread has gotten as long as it has :/
Look here:
$ python
Python 2.6.5 (r265:79063, Jun 13 2010, 14:03:16)
[GCC 4.4.4 (CRUX)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> s = "foo\"bar'"
>>> s
'foo"bar\''
>>> s.replace("\"", "").replace("'", "")
'foobar'
>>>
Surely you can use the same approach ?
cheers
James
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Re: [Tutor] constructing objects with one set of required options
On Fri, Sep 17, 2010 at 7:43 AM, Gregory, Matthew wrote: > Sorry for what is probably a poor subject line ... > > Generally, I'm trying to understand the best way to set up an object's > __init__ if there are some required parameters and other parameters that can > be specified in a number of ways. As an example, I'm working on an envelope > class that describes a spatial envelope complete with cell size information. > Assuming that this envelope needs to have its upper left corner specified and > a cell size, I can *either* specify a lower right corner or the number of > rows and columns to finish the specification. Can folks provide guidance on > a good way to do this? Specifically, I'm wondering if some or all options > should be by position or by keyword. > > Here's my first cut of doing it all by keyword. > > class EnvelopeException(Exception): > pass > > class Envelope(object): > def __init__(self, **kwargs): > try: > self.x_min = kwargs['x_min'] > self.y_max = kwargs['y_max'] > self.cell_size = kwargs['cell_size'] > except KeyError: > err_str = 'Not all required parameters were specified' > raise EnvelopeException(err_str) > > try: > # First try n_cols and n_rows as keyword args > self.n_cols = kwargs['n_cols'] > self.n_rows = kwargs['n_rows'] > except KeyError: > try: > # Try x_max and y_min instead > self.x_max = kwargs['x_max'] > self.y_min = kwargs['y_min'] > except KeyError: > err_str = 'Either the number of rows and columns or ' > err_str += 'the lower-right coordinate was not specified.' > raise EnvelopeException(err_str) > > # calculate the remaining parts of the specification > ... > > (I realize that I could also specify the x_max and the n_rows or y_min and > n_cols and still derive the envelope, but that seemed nonintuitive to me, > although maybe I should consider it.) Rather than present you with what I think (subjective) might be a "good solution", why don't you look up in the python documentation how you define methods and what you can do with them (parameters-wise). I'll summarize: def foo(self, a, b, c): ... def foor(self, a, b, *args): ... def foo(self, a, b, c=None): ... def foo(self, a, b, *args, **kwargs): ... There are probably other combinations, but these are probably the most common. The point I'm trying to make here is that this is really "up to you". Use a combination of variable arguments (*args) and maybe some arguments with default values (c=None) or just use **kwargs. Choice is yours :) cheers James -- -- James Mills -- -- "Problems are solved by method" ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] constructing objects with one set of required options
On Fri, Sep 17, 2010 at 8:35 AM, Gregory, Matthew
wrote:
> Thanks for your reply. I do understand all the different ways parameters can
> be passed and realize that it's up to me to choose that signature. But,
> mostly, I wanted advice on how to make this signature as intuitive as
> possible to a user. So, from my earlier example, a signature with positional
> args like this is a bad idea:
>
> class Envelope:
> def __init__(x_min, y_max, cell_size, *args):
> ...
>
> # are args 3 and 4 rows and columns or x_max, y_min?
> e = Envelope(10, 20, 1, 30, 10)
Don't forget "self".
This signature seems okay to me.
> so I know at least the last two args should probably be keywords, but a
> signature like this is somewhat confusing to me as well because it's not
> immediately clear to me what the first three parameters are by looking at the
> *call* (obviously by looking at the method you can figure it out).
>
> def __init__(x_min, y_max, cell_size, **kwargs):
> e = Envelope(10, 20, 1, n_cols=30, n_rows=10)
> e = Envelope(10, 20, 1, x_max=30, y_min=10)
>
> So I know I'm getting around to answering my own question, but the clearest
> way to me was to provide all keyword args. I just didn't know if this was
> too verbose from a user's standpoint. Really just a stylistic question that
> might be best left to the individual.
In my experience, I've always defined explicit arguments and keyword arguments
for constructors and use **kwargs for anything that can be specified as optional
but have defaults. eg:
class Foo(object)
def __init__(self, a, b, c, x=1, **kwargs):
super(Foo, self).__init__()
self.a = a
self.b = b
self.c = c
self.x = x
self.y = kwargs.get("y", None)
cheers
James
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--
-- "Problems are solved by method"
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Re: [Tutor] plotting pixels
On Fri, Sep 17, 2010 at 12:13 PM, Bill Allen wrote: > Is there a simple way to plot pixels in Python, without resorting to turtle > graphics? Give matplotlib a go. Alternatively you may want to try pygame or pyglet. cheers James -- -- James Mills -- -- "Problems are solved by method" ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Smart posting - Was: Re: Tutor Digest, Vol 80, Issue 11
On Sun, Oct 3, 2010 at 10:11 AM, Alan Gauld wrote: > Please, do not post the entire digest. We don't have time to wade through it > looking for the few lines you may have added or commented upon. I'm actually really surprised anyone actually uses and subscribes to mailing lists and wants to get digests. It's far easier (for me at least) to just get each email as it comes in. --James -- -- James Mills -- -- "Problems are solved by method" ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] creating a class
On Wed, Oct 6, 2010 at 4:16 AM, T MURPHY wrote:
> how do i go about creating a class in python.
By using the "class" keyword.
Example:
class Fruit(object):
def __init__(self, name)
self.name = name
class Apple(Fruit):
def __init__(self):
super(Apple, self).__init__("apple")
apple = Apple()
print apple.name
For more information, I suggest you start reading
the python tutorial (1)
cheers
James
1. http://docs.python.org/tutorial/
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Re: [Tutor] Networking
On Fri, Oct 15, 2010 at 11:22 AM, chris wrote: >> But what if I want it to serve one client, go to another and then go back. >> How does that work? You do some I/O multi-plexing or multi-processing/threading. You might want to do some reading on this. cheers James -- -- James Mills -- -- "Problems are solved by method" ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Networking
On Fri, Oct 15, 2010 at 3:06 PM, Evert Rol wrote: > The very last example on http://docs.python.org/library/socketserver.html may > help you. > Or perhaps the asyncore/asynchat modules. Alternatively Twisted (1) or circuits (2) cheers James 1. http://twistedmatrix.com/trac/ 2. http://bitbucket.org/prologic/circuits/wiki/Home -- -- James Mills -- -- "Problems are solved by method" ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] decorators (the "at" sign)?
On Tue, Oct 26, 2010 at 12:46 PM, Alex Hall wrote: > �...@set_index > def get_url(self, index=None): > return self.storage[index]['Url'] Decorators in python are used (almost as convenience) to wrap functions/methods for various purposes. It might be to do some logging before and after the actual function is called, or setup static methods, etc. The "@" symbol was chosen for this, and in the above example the following is happening: The method get_url(...) is being decorated (as opposed to being wrapped) with the set_index(...) function. (Without knowing too much more about the code you're looking at...) set_index(...) would be doing something with the get_url(...) method then returning it. The best example of this is the following from PEP 318 (1): def onexit(f): import atexit atexit.register(f) return f @onexit def func(): ... This has a similar form to the code you're studying and registers func with atexit hooks so that when the application terminates, func(...) gets called. Hope this helps, cheers James 1. http://www.python.org/dev/peps/pep-0318/ -- -- James Mills -- -- "Problems are solved by method" ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Having Issues with CMD and the 'python' command
"cmd" has _nothing_ to do with Python. --JamesMills -- -- "Problems are solved by method" On Mon, Dec 15, 2008 at 10:51 PM, Lamonte Harris wrote: > Every time I start cmd on windows it requires me to "set > path=%path%;C:\python26" why? I'm getting annoyed... > > -- > http://mail.python.org/mailman/listinfo/python-list > > ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] configuring web browser PP3E
On Thu, Jan 29, 2009 at 11:31 AM, bmol...@att.net wrote: > Traceback (most recent call last): > File "webserver.py", line 22, in ? >srvrobj = HTTPServer(srvraddr, CGIHTTPRequestHandler) > File > "/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/SocketServer.py", > line 330, in __init__ > File > "/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/BaseHTTPServer.py", > line 100, in server_bind > File > "/System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/SocketServer.py", > line 341, in server_bind > File "", line 1, in bind > socket.error: (13, 'Permission denied') srvraddr is being passed a port of 80. I suspect that you're running on a Mac and that Mac's being UNIX systems, do not allow you as a normal user to listen on ports < 1000 without root privileges. Solution 1: Run this under sudo Solution 2: Change the port to 8000 cheers James ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] configuring web browser PP3E
On Thu, Jan 29, 2009 at 12:17 PM, bmol...@att.net wrote:
> yes, i'm running on Mac OS X / Unix, but i'm afraid i don't know "where" to
> change the port to 80. i'm working with the following files straight from
> the book 'Programming Python':
You're not blind are you ? Because I am.
> cgi101.py (here it is...)
> #!/usr/bin/python
> import cgi
> form = cgi.FieldStorage()# parse form data
> print "Content-type: text/html\n"# hdr plus blank line
> print "Reply Page"# html reply page
> if not form.has_key('user'):
> print "Who are you?"
> else:
> print "Hello %s!" % cgi.escape(form['user'].value)
> cgi101.html (here it is...)
>
> Interactive Page
>
>
> Enter your name:
>
>
>
>
> and webserver.py (here it is...)
> ##
> # implement HTTP web server in Python which knows how to run server
> # side CGI scripts; serves files/scripts from current working dir;
> # python scripts must be stored in webdir\cgi-bin or webdir\htbin;
> ##
> webdir = '.' # where your html files and cgi-bin script directory live
> port = 80# default http://localhost/, else use http://localhost:/
Chat the above line.
[...]
cheers
James
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Re: [Tutor] List Changing Order
On Fri, Nov 26, 2010 at 1:47 PM, Corey Richardson wrote: > I recall that the keys of dictionaries have arbitrary order, and may change > over time. Is this true of lists? I can't find the answer from a simple > Google search. Thank you! items append to a list retain their order. cheers James -- -- James Mills -- -- "Problems are solved by method" ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] How to handle exceptions raised inside a function?
On Thu, Dec 2, 2010 at 10:27 AM, Richard D. Moores wrote: > Could I have put stats-0.1.1a anywhere, CD-ed to that "anywhere", and > then run the command? Yes. python setup.py install essentially instructs distutils (or setuptools or distribute - whichever is being used) to "install" the package into your site-packages or $PYTHONPATH (if configured that way by means of configuration). NB: Copying the package's directory into site-packages hwoever has the same effect. The directory that contains the __init__.py cheers James -- -- James Mills -- -- "Problems are solved by method" ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] working with strings in python3
On Tue, Apr 19, 2011 at 10:34 AM, James Mills wrote: > Normally it's considered bad practise to concatenate strings. > Use a a format specifier like this: > >> message = "Bah." >> >> if test: >> message = "%s %s" (message, " Humbug!") >> >> print(message) > > Python3 (afaik) also introduced the .format(...) method on strings. Opps I posted to the wrong list :/ -- -- James Mills -- -- "Problems are solved by method" ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] jenia. cannot install mysqldb
On Thu, Apr 21, 2011 at 9:35 AM, ivlev jenia wrote: > I cannot get the mysqldb library to work. > I'm trying to setup a Django project on Windows 7 using pydev in eclipse. > There are the files I'm using: http://sourceforge.net/projects/mysql-python/ > > Now, for the life of me, I cannot get the mysqldb library to work. > When I try to run the setup file, after the install windows tells me that > there was a problem during install. > I pointed the eclipse project to the mysqldb directory with all the > setup.exe and all the other files. > Of course it did not help. > Can someone please help me? Forgive my lack of experience with WIndows in general; However you'll likely need the MySQL C libraries and a compiler of some kind (Visual Studio / C++ ?) in order to install mysql-python from source... You're probably better off finding a pre-built binary distribution (or a pure python lirbary). Either way, you'll need MySQL install (at the very least mysqlxx.dll or something) cheers James -- -- James Mills -- -- "Problems are solved by method" ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] list.__init__ within class definition
On Thu, Apr 21, 2011 at 1:21 PM, Alex Companioni wrote: > In the following class definition: > > class Tomato(list): > def __init__(self, data): > list.__init__(self, data) > > The list.__init__ method (if it is a method, I'm not clear on what > __init__ actually *is*) creates a list, right? In other words, > > l = Tomato([1,2,3]) > > will create a list l with the values [1,2,3], correct? What you actually want is this: >>> class Tomato(list): ... def __init__(self, data): ... super(Tomato, self).__init__(data) ... >>> l = Tomato([1, 2, 3]) >>> l [1, 2, 3] >>> Your example: >>> class Tomato(list): ... def __init__(self, data): ... list.__init__(data) ... >>> l = Tomato([1, 2, 3]) >>> l [] >>> Do you see why ? cheers James -- -- James Mills -- -- "Problems are solved by method" ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Calling a python script using subprocess
On Fri, Apr 29, 2011 at 7:18 AM, GoodPotatoes wrote: > > p = subprocess.Popen(r'installModule.py --mods mod1 mod2 mod3', executable = > sys.executable, stdout = subprocess.PIPE, stderr = subprocess.STDOUT) Try this (untested): p = subprocess.Popen(["/usr/bin/env python", "installModule.py", "--mods", "mod1", "mod2", "mod3"], stdout = subprocess.PIPE, stderr = subprocess.STDOUT) cheers James -- -- James Mills -- -- "Problems are solved by method" ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Titles from a web page
On Thu, May 5, 2011 at 1:52 PM, Modulok wrote: > You might look into the third party module, 'BeautifulSoup'. It's designed to > help you interrogate markup (even poor markup), extracting nuggets of data > based > on various criteria. lxml is also work looking into which provides similar functionality. -- -- James Mills -- -- "Problems are solved by method" ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Programmatically Post to Pastebin
On Wed, May 11, 2011 at 9:57 AM, Lan Rogers wrote: > I want to post files stored on a machine to Pastebin (or any similar > service for that matter) using a python script, and then store a link > to that post. Also, I would strongly prefer to avoid doing something > that requires an API key. A similar tool I wrote (which pastes to codepad.org) is here: https://bitbucket.org/prologic/tools/src/59d89262e6b1/codepad The approach would be very similar. Feel free to adapt this. cheers James -- -- James Mills -- -- "Problems are solved by method" ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
