🌐 Mailman 3 July 2007 - Python-list - python.org

Help text embedding in C code?
by James Stroud July 31, 2007

July 31, 2007

Hello All, I have a python module I wrote in C some time ago and I have since forgotten how to use my functions and so I wanted to add some doc-strings such that "help(function_name)" would give some help in the interactive interpreter. In the cPython source, it seems like python wrapper functions provide this documentation in doc-strings. Is this the advisable way? It seems silly to have to write a python wrapper around a python extension just to have doc-strings available. Is it possible to embed this information in the C source directly or is that too much trouble and I should just start typing HTML.reStructuredText for this sort of thing? James -- James Stroud UCLA-DOE Institute for Genomics and Proteomics Box 951570 Los Angeles, CA 90095 http://www.jamesstroud.com/

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Re: Fwd: Re: Comparing Dictionaries
by Steven D'Aprano July 31, 2007

July 31, 2007

On Mon, 30 Jul 2007 14:06:29 -0500, Kenneth Love wrote: > >>From: "Steven D'Aprano" <steve(a)REMOVE.THIS.cybersource.com.au> >>Newsgroups: comp.lang.python >>Subject: Re: Comparing Dictionaries >>Date: Sat, 28 Jul 2007 10:21:14 +1000 >>To: python-list(a)python.org >> >>On Fri, 27 Jul 2007 14:11:02 -0500, Kenneth Love wrote: >> >> > The published recipe (based on ConfigParser) did not handle my INI >> > files. I have periods in both the section names and the key names. >> > The INI files contents were developed according to an internally >> > defined process that other non-Python programs rely on. The published >> > recipe *did not work* with this scenario. >> >>I think you have made a mistake. ConfigParser as published certainly DOES >>accept periods in section and option names. It just *works*. > > The recipe I'm using is based upon ConfigParser and creates a dictionary > that is based on the contents of the INI file. The dictionary's key is > based on the section name and the key name from the INI file. The two > are concatenated with a separator. > > In the original recipe, the separator is a period. To use your example > (deleted as an attempt at brevity), the dictionary would be: > > { "SECTION.FRED.option.wilma" : "45" } Well, that's just broken. "Flat is better than nested" is only true when things are actually better flat rather than nested. The right way to build a dictionary from an INI file is with nested dictionaries: {"SECTION1": {"option1": 20, "option2": 30}, "SECTION2": {"option1", 2.0, "option2": 3.0}} That treats each section as a single piece. But if you absolutely insist on flattening the dictionary, the right way is not to concatenate the section name and the option name into a single string, but to use a tuple ("SECTION", "option"). [snip] > In no way did I rewrite ConfigParser. I have a real job with time > pressures and I'm not so arrogant as to think I could whip something > up in an hour that would be anywhere close to correct. > > I see that I wasn't as clear as I thought I was in my original post > as you are second person to think I was developing my own INI solution. Copying somebody else's code and modifying it is still recreating an existing solution. Python has an INI file parser. What does it not do that you have to recreate it by creating your own version? Oh, ironically, the recipe you borrowed in fact uses the Python ConfigParser to do all the heavy work. All it really does is flatten the ConfigParser nested dictionary into a flat dictionary. I fail to see the advantage. > All I wanted to know was "How do I compare two dictionaries to see if > they are equal?". Yes, but I suspect what you _wanted_ to know and what you _needed_ to know are different. -- Steven.

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Re: win32 question in Python
by Cappy2112 July 31, 2007

July 31, 2007

Hello Brad, If you don't get a reply here, there is a win32 specific Python list on ActiveState.com wher ethey do talk about excel & other Win32 python issues. On Jul 30, 3:49 pm, Brad Johnson <Brad.John...(a)ballardtech.com> wrote: > Huang, Shun-Hsien <shuang <at> ercot.com> writes: > > > > but how do I copy a excel file into > > > database table by using Python? > > I'm not sure if this helps, but you can access the Excel Automation model very > easily with: > > import win32com.client > > x1 = client.Dispatch("Excel.Application") > > Now you can use the x1 object to access any of the properties and methods in the > Excel Automation model.

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Re: Comparing Dictionaries
by Paul Rubin July 31, 2007

July 31, 2007

Kenneth Love <klove(a)tax.ok.gov> writes: > I will search on Google for more info on Doctest. Doctest is recent. Try: http://python.org/doc/lib/module-doctest.html Diveintopython should probably be updated to use doctest instead of unittest. unittest is Java-descended and doesn't fit into Python as well as doctest does.

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128 or 96 bit integer types?
by Robert Dailey July 31, 2007

July 31, 2007

Hi, Is there build-in or third party support for large integer types, such as 96 or 128 bits in size? I require such large sizes for precision issues (nanoseconds). Thanks.

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win32 question in Python
by Huang, Shun-Hsien July 31, 2007

July 31, 2007

Hi, I am new in Python. I have one question in the database application in python. I have one excel file that I want to save in the database table. In the Microsoft access, I can easy do this one by using Docmd ...... How do I use this one in Python? I already know how to connect to a database through Python, but how do I copy a excel file into database table by using Python? Best Regards. Shun-Hsien Huang (Fred)

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Re: yield keyword usage
by mensanator＠aol.com July 31, 2007

July 31, 2007

On Jul 30, 4:40 pm, Erik Jones <e...(a)myemma.com> wrote: > On Jul 30, 2007, at 4:13 PM, Ehsan wrote: > > > > > > > hi > > coulde any one show me the usage of "yield" keyword specially in this > > example: > > > """Fibonacci sequences using generators > > > This program is part of "Dive Into Python", a free Python book for > > experienced programmers. Visithttp://diveintopython.org/for the > > latest version. > > """ > > > __author__ = "Mark Pilgrim (m...(a)diveintopython.org)" > > __version__ = "$Revision: 1.2 $" > > __date__ = "$Date: 2004/05/05 21:57:19 $" > > __copyright__ = "Copyright (c) 2004 Mark Pilgrim" > > __license__ = "Python" > > > def fibonacci(max): > > a, b = 0, 1 > > while a < max: > > yield a > > a, b = b, a+b > > > for n in fibonacci(1000): > > print n, > > As in how it works? Sure, when you use the yield statement in a > function or method you turn it into a generator method that can then > be used for iteration. What happens is that when fibonacci(1000) is > called in the for loop statement it executes up to the yield > statement where it "yields" the then current value of a to the > calling context at which point n in the for loop is bound to that > value and the for loop executes one iteration. Upon the beginning of > the for loop's next iteration the fibonacci function continues > execution from the yield statment until it either reaches another > yield statement or ends. In this case, since the yield occured in a > loop, it will be the same yield statement at which point it will > "yield" the new value of a. It should be obvious now that this whole > process will repeat until the condition a < max is not longer true in > the fibonacci function at which point the function will return > without yielding a value and the main loop (for n in ...) will > terminate. Also note that the function could terminate without ever executing a yield statement (if max<0). In which case nothing would get printed just like in for n in []: print n, You could also force the generator to abort rather than relying on the while loop not executing by using a return instead of a yield statement. This can be useful if the while executes even when given bad arguments. def fibonacci(max): if max < 0: # test for invalid argument print 'max must be >0' # diagnostic message return # kill generator a, b = 0, 1 while a < max: yield a a, b = b, a+b for n in fibonacci(1000): print n, print print for n in fibonacci(-1000): print n, ## 0 1 1 2 3 5 8 13 21 34 55 89 144 233 377 610 987 ## ## max must be >0 > > Erik Jones > > Software Developer | Emma� > e...(a)myemma.com > 800.595.4401 or 615.292.5888 > 615.292.0777 (fax) > > Emma helps organizations everywhere communicate & market in style. > Visit us online athttp://www.myemma.com

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Re: Comparing Dictionaries
by Paddy July 31, 2007

July 31, 2007

On Jul 30, 8:30 pm, Kenneth Love <kl...(a)tax.ok.gov> wrote: > At 03:23 AM 7/28/2007, you wrote: > > >Hi Kenneth, being new to Python i wondered if you at least considered > >Doctests as part of your testing solution. > >Other languages don't have Doctest. > > >- Paddy. > > Until I read your post, I had never even heard of Doctest. I will look > into it. > > Here is the list of online sources I've found: > > http://www.ibiblio.org/obp/thinkCSpy/index.htmlhttp://www.diveintopython.or… > > Here are the O'Reilly books I purchased from Barnes & Noble: > > Python in a Nutshell (2nd ed.) > Python Cookbook (2nd ed.) > Programming Python (3rd ed.) > > I am a slow reader. So, if Doctests are mentioned in any of the above, > I haven't encountered it yet. > > Specifically, my information on unit testing comes from reading about > half of this online chapter: > > http://www.diveintopython.org/unit_testing/index.html > > I will search on Google for more info on Doctest. > > Thanks! > > Sincerely, > Kenneth Love Add to your list: http://agiletesting.blogspot.com/2005/01/python-unit-testing-part-2-doctest… http://en.wikipedia.org/wiki/Doctest Have fun. - Paddy.

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Re: How to write GUI and event separately in wxPython??
by star.public＠gmail.com July 31, 2007

July 31, 2007

On Jul 30, 11:42 am, "Chris Mellon" <arka...(a)gmail.com> wrote: > > > On Mon, 30 Jul 2007 06:32:55 -0400, Steve Holden wrote: > > > >> >>> [x for x in xrange(0, 101)] == [y for y in xrange(101)] > > >> True > nitpick: list(xrange(42)) == list(xrange(42)) is slightly more concise > than the list comp.. Not that it has anything to do with this topic anymore, but I find the list comp a bit clearer for expressing the thought 'each element in one is the same as the coresponding element in the other, or: the sequences are identical' -- the list() version would proabably have had me going 'huh?' even longer ^_^. -- [star for star in weaver]

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July 31, 2007

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