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• how to use ffmpeg

  - by Moayyad Yaghi

  hello .. im trying to extract frames from a video .. and i picked ffmpeg ( tell me if you know something better ) for this task i downloaded it's source .. and i don't know how to use it ?? how do i compile it ?? what is the recommended language for it ?? i know python and C++ please note that i use windows vista 64x .

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• How do I view this in an easy format to read? (JSON)

  - by alex

  https://search.twitter.com/search.json?q=doug How do I read this like VIEW SOURCE, so that I know what I'm looking at? Is there a website that can prettify it for me? BTW, I use python

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• Open source equivelants to VS / web reference proxy class autogen?

  - 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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• How to iterate over the first n elements of a list?

  - by Bialecki

  Say I want I've got a list and I want to iterate over the first n of them. What's the most concise way to write this in Python?

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• I want to learn a new language!

  - by Alex

  Hi, I'm a college student majoring in computer science. I know java and will be learning C++ the next couple years at school. I want to add another language to my repertoire and have gotten conflicting advice: Ruby, Python, Perl, JavaScript, PHP, AJAX, among others. I was wondering what everyone's opinions were on the relative value of each of these languages in the job market, the ease of learning of each of the languages, and just personal preferences when it comes to the languages mentioned above. Thanks!

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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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• Getting started with C++ ( the paradigm shift from Python )

  - by orokusaki

  I want to learn C++ so that i can develop C++ Python modules for server-related stuff. I'm a purely dynamic languages developer (Python, PHP, Ruby, etc). I want to learn a fast language, and if I'm going to do this, I'd rather learn a really fast language like C++. Before I even get started though, I understand that suddenly working with static types, a different syntax, and compiling code will be quite the paradigm shift. Is there any advice that a C++ dev who also has dynamic languages experience can give me to me to help me make that shift faster?

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• Check to see if system volume is muted?

  - by Zachary Brown

  Hello everyone. I am working on a project that plays audio for part of the program. I would like to be able to display a message if the user's system volume is muted. I am using Python on Windows.

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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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• Why can't my function access a variable in an enclosing function?

  - by nailer

  I know about the LEGB rule. But a simple test of whether a function has read access to variables defined in an enclosing function doesn't seem to actually work. Ie: #!/usr/bin/env python2.4 '''Simple test of Python scoping rules''' def myfunction(): print 'Hope this works: '+myvariable def enclosing(): myvariable = 'ooh this worked' myfunction() if __name__ == '__main__': enclosing() Returns: NameError: global name 'myvariable' is not defined Am I doing something wrong? Is there more to it than the LEGB resolution order?

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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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• Is there an alternative to Pidgin, but with less restrictive licensing?

  - by morpheous

  Recently came across pidgin. Its great, and does what I want, but I am not too keen on the GPL license. Other any alternatives, with less restrictive licenses? I would prefer the library to be C or C++, as I am most familiar with those languages, but a an IM library implemented in python would be interesting too.

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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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• 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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• datetime.datetime.strptime problem

  - by Rahul99

  My input string is '16-MAR-2010 03:37:04' and i want to store it as datetime. I am trying to use: db_inst.HB_Create_Ship_Date = datetime.strptime(fields[7]," %d-%b-%Y %H:%M:%S ") fields[7] = '16-MAR-2010 03:37:04' I am getting an error: ::ValueError: time data '16-MAR-2010 03:37:04' does not match format ' %d-%b-%Y %H:%M:%S ' I am running Python version --EDIT-ME-- on the --EDIT-ME-- operating system. My locale is --EDIT-ME--. Which format do I have to use?

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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 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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• 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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• Which parallel sorting algorithm has the best average case performance?

  - by Craig P. Motlin

  Sorting takes O(n log n) in the serial case. If we have O(n) processors we would hope for a linear speedup. O(log n) parallel algorithms exist but they have a very high constant. They also aren't applicable on commodity hardware which doesn't have anywhere near O(n) processors. With p processors, reasonable algorithms should take O(n/p log n/p) time. In the serial case, quick sort has the best runtime complexity on average. A parallel quick sort algorithm is easy to implement (see here and here). However it doesn't perform well since the very first step is to partition the whole collection on a single core. I have found information on many parallel sort algorithms but so far I have not seen anything pointing to a clear winner. I'm looking to sort lists of 1 million to 100 million elements in a JVM language running on 8 to 32 cores.

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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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• 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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• 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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• 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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• 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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• non-uniform distributed random array

  - by Javier

  Dear all, I need to generate a vector of random float numbers between [0,1] such that their sum equals 1 and that are distributed non-uniformly. Is there any python function that generates such a vector? Best wishes

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