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python Programming Glossary: someWhat is a metaclass in Python? http://stackoverflow.com/questions/100003/what-is-a-metaclass-in-python just OO concepts but this one is tricky. I know it has something to do with introspection but it's still unclear to me... Since classes are objects they must be generated by something. When you use the class keyword Python creates this object.. MyObject MyClass You've seen that type lets you do something like this MyClass type 'MyClass' It's because the function..
http://stackoverflow.com/questions/107705/python-output-buffering sys.stdout.fileno 'w' 0 Is there any other way to set some global flag in sys sys.stdout programmatically during execution.. PYTHONUNBUFFERED. You could also replace sys.stdout with some other stream like wrapper which does a flush after every call...
Which Python memory profiler is recommended? [closed] http://stackoverflow.com/questions/110259/which-python-memory-profiler-is-recommended improve this question Heapy is quite simple to use. At some point in your code you have to write the following from guppy.. from guppy import hpy h hpy print h.heap This gives you some output like this Partition of a set of 132527 objects. Total.. objects are referenced and get statistics about that but somehow the docs on that are a bit sparse. There is a graphical browser..
Difference between __str__ and __repr__ in Python http://stackoverflow.com/questions/1436703/difference-between-str-and-repr-in-python server system. Python makes it easy to log with maybe some project specific wrappers all you need is a log INFO I am in.. want to read it. Chop off useless digits pretend to be some other class as long is it supports readability it is an improvement...
Fastest way to list all primes below N in python http://stackoverflow.com/questions/2068372/fastest-way-to-list-all-primes-below-n-in-python from the set. Nevertheless it works at least for me for some input numbers sum get_primes 2000000 142913828922L #That's the..
Python “is” operator behaves unexpectedly with integers http://stackoverflow.com/questions/306313/python-is-operator-behaves-unexpectedly-with-integers numbers compare properly I am using Python 2.5.2. Trying some different versions of Python it appears that a Python 2.3.3..
How do you split a list into evenly sized chunks in Python? http://stackoverflow.com/questions/312443/how-do-you-split-a-list-into-evenly-sized-chunks-in-python it up into equal size chunks and operate on it. There are some obvious ways to do this like keeping a counter and two lists.. chunks l 10 1..10 11..20 .. 991..999 I was looking for something useful in itertools but I couldn't find anything obviously..
Is there any way to kill a Thread in Python? http://stackoverflow.com/questions/323972/is-there-any-way-to-kill-a-thread-in-python you want to interrupt it. The following code allows with some restrictions to raise an Exception in a python thread def _async_raise..
Ternary conditional operator in Python http://stackoverflow.com/questions/394809/ternary-conditional-operator-in-python Yes it was added in version 2.5. It's frowned upon by some pythonistas so keep that in mind. The syntax is a if test else..
What does `if __name__ == “__main__”:` do? http://stackoverflow.com/questions/419163/what-does-if-name-main-do that it's executing as the main function e.g. you said something like python threading_example.py on the command line. After.. shown there. One of the reasons for doing this is that sometimes you write a module a .py file where it can be executed.. run the module as a program and not have it execute when someone just wants to import your module and call your functions..
How to improve performance of this code? http://stackoverflow.com/questions/4295799/how-to-improve-performance-of-this-code to improve performance of this code Thanks to some help from people here I was able to get my code for Tasmanian..
Making a flat list out of list of lists in Python [duplicate] http://stackoverflow.com/questions/952914/making-a-flat-list-out-of-list-of-lists-in-python in Python. I can do that in a for loop but maybe there is some cool one liner I tried it with reduce but I get an error. Code..
Python: How do I pass a variable by reference? http://stackoverflow.com/questions/986006/python-how-do-i-pass-a-variable-by-reference self.variable def Change self var var 'Changed' Is there something I can do to pass the variable by actual reference python.. to a variable but the reference is passed by value some data types are mutable but others aren't So If you pass a mutable.. the object. Okay this is a little confusing. Let's have some examples. List a mutable type Let's try to modify the list that..
Python list doesn't reflect variable change http://stackoverflow.com/questions/12080552/python-list-doesnt-reflect-variable-change dict set tuple etc. are simply collections of threads too. Some of these can have their threads swapped out for different threads..
What is the simplest way to SSH using Python? http://stackoverflow.com/questions/1233655/what-is-the-simplest-way-to-ssh-using-python blog post I originally linked to is not available anymore. Some of the comments that refer to the old version of this answer..
Showing the stack trace from a running Python application http://stackoverflow.com/questions/132058/showing-the-stack-trace-from-a-running-python-application interpreter to show you the exact code that's running Some kind of on the fly stacktrace python stack trace share improve..
About python's built in sort() method http://stackoverflow.com/questions/1517347/about-pythons-built-in-sort-method will eventually switch to his recent port of timsort . Some explanation of the Java port of timsort is here the diff is..
Loop “Forgets” to Remove Some Items http://stackoverflow.com/questions/17299581/loop-forgets-to-remove-some-items &ldquo Forgets&rdquo to Remove Some Items in this code I am trying to create a function anti_vowel..
http://stackoverflow.com/questions/1819124/image-comparison-algorithm of Peter Hansen Works very well Thanks to all answers Some results can be found here http labtools.ipk gatersleben.de image..
Why is numpy's einsum faster than numpy's built in functions? http://stackoverflow.com/questions/18365073/why-is-numpys-einsum-faster-than-numpys-built-in-functions the correct answer but have not been able to confirm it. Some limited proof can be found by changing the dtype of input array.. odd performance of sum td3332.html Some of boils down to the fact that einsum is new and is presumably..
How do I get the path of the current executed file in python? http://stackoverflow.com/questions/2632199/how-do-i-get-the-path-of-the-current-executed-file-in-python This may seem like a newbie question but it is not. Some common approaches don't work in all cases sys.argv 0 This means..
Print in terminal with colors using Python? http://stackoverflow.com/questions/287871/print-in-terminal-with-colors-using-python Characters 176 177 178 and 219 are the block characters . Some modern text based programs such as Dwarf Fortress emulate text..
Short Description of Python Scoping Rules http://stackoverflow.com/questions/291978/short-description-of-python-scoping-rules def spam..... code3 for code4.. code5 x Where is x found Some possible choices include the list above In the enclosing source..
Suggestions for a Cron like scheduler in Python? http://stackoverflow.com/questions/373335/suggestions-for-a-cron-like-scheduler-in-python from datetime import datetime timedelta import time # Some utility classes functions first class AllMatch set Universal..
Python: Is there a way to determine the encoding of text file? http://stackoverflow.com/questions/436220/python-is-there-a-way-to-determine-the-encoding-of-text-file for specific languages and languages are not random. Some character sequences pop up all the time while other sequences..
Accessing dict keys like an attribute in Python? http://stackoverflow.com/questions/4984647/accessing-dict-keys-like-an-attribute-in-python AttrDict self .__init__ args kwargs self.__dict__ self Some pros It actually works No dictionary class methods are shadowed..
Old style and new style classes in Python http://stackoverflow.com/questions/54867/old-style-and-new-style-classes-in-python of important details in addition to what type returns. Some of these changes are fundamental to the new object model like..
In Python, why can a function modify some arguments as perceived by the caller, but not others? http://stackoverflow.com/questions/575196/in-python-why-can-a-function-modify-some-arguments-as-perceived-by-the-caller After 1 0 1 2 3 4 python share improve this question Some answers contain a word copy in a context of a function call...
Recommendations of Python REST (web services) framework? [closed] http://stackoverflow.com/questions/713847/recommendations-of-python-rest-web-services-framework services rest frameworks share improve this question Something to be careful about when designing a RESTful API is the.. this you'll end up falling into a REST anti pattern . Some frameworks that get it right are web.py Flask and Bottle . When..
http://stackoverflow.com/questions/73663/terminating-a-python-script the range 0 127 and produce undefined results otherwise. Some systems have a convention for assigning specific meanings to..
Is there a portable way to get the current username in Python? http://stackoverflow.com/questions/842059/is-there-a-portable-way-to-get-the-current-username-in-python this under say Linux but it is not present on Windows. Some of the search results suggested that getting the username under..
What is the reason for performing a double fork when creating a daemon? http://stackoverflow.com/questions/881388/what-is-the-reason-for-performing-a-double-fork-when-creating-a-daemon but not why. Edit Thanks for the excellent answers. Some mention that it is to prevent the daemon from acquiring a controlling..
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