Python Forum

i thought id ask here before wirting a PEP, if people thought it would be a good enhancement to allow if clauses in regular for-statements like so: >>> for x in y if x < 10 : is semantically equivalent to >>> for x in : but is shorter and easier to read. basically, the if works as a filter for

I've tried p = open('LPT1:','wb') p.write('test') and it doesn't work. I've also tried win32print's WritePrinter and it doesn't work either. Does anyone know of an easy way to print strings and such from within a python script to windows' printers?

Does anyone know how to avoid getting a DOS shell launched everytime you run a wxPython script? The shell is used to run Python.exe but it doesn't look very professional when a black window pops up along with your GUI. Thanks, Matt

Hi all I am writing a general accounting application. A user can log in to the application and stay there for a long time, maybe all day, moving around the menu system, selecting an item to perform a task, then returning to the menu and selecting another item. I want to ensure that each item selected cleans itself up correctly when it is...

Is there a function that takes a number with binary numeral a1...an to the number with binary numeral b1...bn, where each bi is 1 if ai is 0, and vice versa? (For example, the function's value at 18 would be 13 .) I thought this was what the tilde operator (~) did, but when I went to try it I found out that wasn't the case. I discovered by...

According to this link Python had joined the open source forces. http://www.atai.org/softwarewar.png /Mikael

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Hi - this mysterious behavior with shelve is just about to kill me. I hope someone here can shed some light. First of all, I have this piece of code which uses shelve to save instances of some class I define. It works perfectly on an old machine (PII-400) running Python 2.2.1 under RedHat Linux 8.0. When I try to run it under Python for...

I've got this string in which I need to sub in the same word several times; i.e: >>> "%s - %s - %s" % ("test","test","test") 'test - test - test' >>> But I want to use the * to make life easier to read, so I tried: >>> ("test",)*3

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Here is a simple idea to make generators more useful for some applications, although I won't for now name them.. anyways, advantage of current generators was not too obvious for all the people, too. So, currently the interface between generator and it's user program is rather poor, because it only consists of a signal from a user routine,...

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"Brad Clements" <bkc@murkworks.com> writes: > Once again I apologize for posting this py2exe question in the ctypes list. ;-) In the long run, this will be the wrong forum. I suggest comp.lang.python (or should a py2exe mailing list be created?). And I'm cc'ing to python-list. > > I need to ship a Windows service in py2exe, but I also...

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def foo(): pass foo is a function foo is a callable object foo has method __call__ defined foo.__call__ is a function foo.__call__ is a callable object foo.__call__ has method __call__ defined

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Hello fellow python users, I am trying to use Python Mega widgets and the BLT extension to Tk for my project. Pmw scripts seem to work fine. However, I could not run the BLT examples since BLT was not installed. BLT installation was interesting since while the INSTALL file in the tar ball indicated that the default install directory is...

Sometimes I find myself simply wanting the length of an iterator. For example, to collect some (somewhat useless ;)) statistics about a program of mine, I've got code like this: objs = gc.get_objects() classes = len() functions = len() modules = len() dicts = len() lists = len()

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Where can I find a list and documentation for codecs? What I want to do is to make a unicode string out of unicode data. for example. I am parsing NTFS metadata, that contains filenames as UCS-2 code, so I have a binary string that pretends to be a UCS-2. Currently I am using hand-written module, a wrapper to iconv library, to make...

I'm trying to get a simple service to work with py2exe and python 2.3 I get this error when I start it (after registering it) The description for Event ID ( 240 ) in Source ( UMXWIN32SVC ) cannot be found. The local computer may not have the necessary registry information or message DLL files to display messages from a remote computer. The...

In this hypothetical case: def f1: f3: def f2: def f3: pass f1: def f4: def f3: