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Search found 13693 results on 548 pages for 'python metaprogramming'.

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• How do I determine all of my IP addresses when I have multiple NICs?

  - by Wilson Fowlie

  I have multiple Network Interface Cards on my computer, each with its own IP address. When I use gethostbyname(gethostname()) from Python's (built-in) socket module, it will only return one of them. How do I get the others?

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• Letter Count on a string

  - by user74283

  Python newb here. I m trying to count the number of letter "a"s in a given string. Code is below. It keeps returning 1 instead 3 in string "banana". Any input appreciated. def count_letters(word, char): count = 0 while count <= len(word): for char in word: if char == word[count]: count += 1 return count print count_letters('banana','a')

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• when a data is put in a empty queue i want my thread to starts its activity

  - by sia

  i want my thread to sleep when a queue is empty and just wake up when a data is put in it, should i use condition object? i have never used this object before! and i can,t find a simple example in python

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• Open source equivelants to VS / web reference proxy classes?

  - by seraphym

  As an ASP.NET developer, I'm used to working with how VS/C# transparently autogens proxy classes for web references (yes, I know, we're spoiled), but now that I'm creating documentation for more than one coding platform I'm trying to discover what the equivelant to that is in any other framework. So is there a similar way to work transparently with web reference proxy classes for say, RoR, PHP, and Python? And if there's nothing integrated, are there tools you recommend to autogen the proxy classes, or do you recommend to roll custom classes?

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• efficiently list items in tuples starting at end

  - by Donnied

  I'd like to list the items in a tuple in Python starting with the back and go to front. Similar to: foo_t = tuple(int(f) for f in foo) print foo, foo_t[len(foo_t)-1] ... I believe this should be possible without Try ...-4, except ...-3. Thoughts? suggestions?

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• How can I make list or set translatable using gettext?

  - by Thomas

  I have some structure in Python: gender=( ('0','woman'), ('1','man') ) I want translate it before I will display it in Django template. Unfortunatelly below sollution don't work: from django.utils.translation import ugettext_lazy as _ gender=( ('0',('woman')), ('1',('man')) ) What I must do to translate this. I readed something in: link text but I can't understand what I should do.

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• Is closing file descriptor and removing inotify watch really necessary?

  - by hell.orts.ru

  With python inotifyx, do I have to remove watch and close opened system file descriptor if I need them until program exit? E.g. is there some possible problems if I create one (file descriptor + watch) with each run and don't close it?

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• How to zip multiple lists in Haskell?

  - by TheMachineCharmer

  In python zip function accepts arbitrary number of lists and zips them together. >>> l1 = [1,2,3] >>> l2 = [5,6,7] >>> l3 = [7,4,8] >>> zip(l1,l2,l3) [(1, 5, 7), (2, 6, 4), (3, 7, 8)] >>> How can I zip together multiple lists in haskell?

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• How to turn on and minimize Microsoft Speech Recognition?

  - by aF

  I'm using Windows 7 Pro and I made a C# program that makes Speech Recognition. When I run the program, the Speech Recognition App initializes. Now, how can I turn it on ("Listen to everything I say") and minimize it (so it goes to systems tray and isn't visible), using C# or Python?

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• have to invoke (Thread.__init__) in my overridden constructor, but why?

  - by sia

  i saw this phrase in python 2.6 man: class threading.Thread(group=None, target=None, name=None, args=(), kwargs={}) . . . If the subclass overrides the constructor, it must make sure to invoke the base class constructor (Thread.__init__()) before doing anything else to the thread. i just wanna know why?

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• How do I name a variable with acronym?

  - by Vishal

  For example in Java for Data Transfer Object I use as: ExampleDTO exampleDTO = new ExampleDTO(); What naming convention should I follow for similar in Python?

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• What speech libraries are available in Linux?

  - by George Edison

  When it comes to TTS (text-to-speech) libraries in Linux, what choices do developers have? What libraries ship with the majority of distros? Are there minimal libraries? What functionality does each library offer? I'm approaching this primarily from a C++ point of view, although Python would suit me too.

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• Is cropping of jpeg images using the PIL lossless?

  - by Acorn

  A simple questions really. If you crop a jpeg image using the Python Imaging Library, is the resulting image recompressed, or is it lossless?

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• How to print all possibilities of a number that occur interchanging the digits in a number?

  - by RADHA KRISHNA LOLLA

  I want to print that the all possibilities of a number that occurs interchanging the digits in a number? I want to print that the all possibilities of a number that occurs interchanging the digits in a number? Suppose a number 1234 it have 24 possibilities 4!=24 123 have 6 possibilities 3!=6 123 132 213 231 312 321 i want these numbers as output please tell me the structure of this program in the python

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• TERM environment variable not set

  - by rahkarp

  I'm using python to develop an app and want to view running processes.The code txt = commands.getoutput("top -d 1") print txt gives an error "TERM Environment Variable not set" Can someone tell me what this means and how to solve this

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• Tips for debugging list comprehensions?

  - by andylei

  Python list comprehensions are nice, but near impossible to debug. You guys have any good tips / tools for debugging them?

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• UnicodeDecodeError in pyton 2.7

  - by user2913962

  i try to write this code to process Arabic language by python import codecs file = codecs.open("C:\Python27\CCA_raw_utf8.txt","r","utf-8") text= file.read() #################################### print "\n "," --------------------------------------------" text=text[1:] words=text.split() for w in words: if w == unicode ("?????","utf-8"): print w but it doesn't and take error " if w == unicode ("?????","utf-8"): UnicodeDecodeError: 'utf8' codec can't decode byte 0xc7 in position 0: invalid continuation byte " why program gives this result and how we can correct that??

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• Is there any difference between "foo is None" and "foo == None"?

  - by Joe Shaw

  Is there any difference between: if foo is None: pass and if foo == None: pass The convention that I've seen in most Python code (and the code I myself write) is the former, but I recently came across code which uses the latter. None is an instance (and the only instance, IIRC) of NoneType, so it shouldn't matter, right? Are there any circumstances in which it might?

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• Gmail mail server

  - by Neveen

  Hello, I used use Google’s slick interface to get my mail and It’s always going to be here: https://mail.google.com/a/yourdomainhere.com I want to write python script that send mail so i failed to configure server settings smtp = smtplib.SMTP('what is mail server will be?', what is the port) smtp.login('[email protected]', 'pass') Please could any one help me ?? Thanks

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• Has anyone used Sphinx to document a C++ project?

  - by Nick

  Sphinx is a new documentation tool for Python. It looks very nice. What I'm wondering is: How suitable this is for documenting a C++ project? Are there any tools for converting existing documentation (e.g. doxygen) to Sphinx format? Are there online/downloadable examples of C++ projects that use Sphinx? Any tips from anyone who has used Sphinx?

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• django template find value within list

  - by dotty

  Hay, how do i find a value with in python list in django's template system? example list = [1,2,3,4,5,6,7] x = 1 if x is in list: return u'found!' else: return u'not found' endif: Something along those lines. any help would be great

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• Does a syntax for this exist? In any language?

  - by Michael

  It seems pretty common to me to have an argument, in a dynamically typed language that is either an Object or a key to lookup that object. For instance when I'm working with a database I might have a method getMyRelatedStuff(person) All I really need to lookup the related stuff is the id of the person so my method could look like this in python: def getMyRelatedStuff(person_or_id): id = person_or_id.id if isinstance(person,User) else person_or_id #do some lookup Or going the other direction: def someFileStuff(file_or_name): file = file_or_name if hasattr(file,'write') else open(file_or_name)

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• Trying to provide a global logging function

  - by Gekitsuu

  I typically write my scripts with a structure like s #!/usr/bin/python import stuff def do_things(): print "FOO" def main(): do_things() if __name__ == "__main__": main() The problem I have is I'd like to have a logging function that is defined globally and I"m not really sure how to do this. I tried a decorator function but if I define it in main I can't call it from other functions in the script. It seems like something that should be easy to do but not something I have experience with.

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• How to keep same substrings in vim regex

  - by invisiblerhino

  Hi everyone. I'd ideally like a vim answer to this: I want to change [*, 1, *, *] to [*, 2, *, *] Here the stars refer to individual characters in the substring, which I would like to keep unchanged. For example [0, 1, 0, 1] to [0, 2, 0, 1] [1, 1, 1, 1] to [1, 2, 1, 1] If people know how to do this in perl or python or whatever, that would be equally good. Cheers

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• Get a list/tuple/dict of *all* the arguments passed to a function?

  - by Phillip Oldham

  Given the following function: def foo(a, b, c): pass How would one obtain a list/tuple/dict/etc of the arguments passed in? Specifically, I'm looking for Python's version of JavaScript's arguments keyword or PHP's func_get_args() method. What I'm not looking for is a solution using *args or **kwargs; I need to specify the argument names in the function definition (to ensure they're being passed in) but within the function I want to work with them in a list- or dict-style structure.

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