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python Programming Glossary: involvesWhat is a metaclass in Python? http://stackoverflow.com/questions/100003/what-is-a-metaclass-in-python some stuff in __init__ too if you wish # some advanced use involves overriding __call__ as well but we won't # see this def __new__..
Why is SQLAlchemy insert with sqlite 25 times slower than using sqlite3 directly? http://stackoverflow.com/questions/11769366/why-is-sqlalchemy-insert-with-sqlite-25-times-slower-than-using-sqlite3-directly its last inserted id if not already given and also involves that rows to be inserted are scanned and sorted for dependencies..
Python: tf-idf-cosine: to find document similarity http://stackoverflow.com/questions/12118720/python-tf-idf-cosine-to-find-document-similarity author didn't have time for the final section which involves using cosine to actually find the similarity between two documents...
Python relative imports for the billionth time http://stackoverflow.com/questions/14132789/python-relative-imports-for-the-billionth-time relative import in non package has an answer that involves m supposedly. Can somebody please tell me why Python gives that..
http://stackoverflow.com/questions/15541404/python-string-interning LOAD_CONST 4 'string' 9 STORE_FAST 1 s2 The third example involves a run time concatenation the result of which is not automatically..
What do backticks mean to the python interpreter: `num` http://stackoverflow.com/questions/1673071/what-do-backticks-mean-to-the-python-interpreter-num f3 9 0 LOAD_FAST 0 a 3 UNARY_CONVERT 4 RETURN_VALUE f1 involves a global lookup for repr f2 an attribute lookup for __repr__..
How do I un-escape a backslash-escaped string in python? http://stackoverflow.com/questions/1885181/how-do-i-un-escape-a-backslash-escaped-string-in-python eval escaped_str print raw_str Hello world However that involves passing a possibly untrusted string to eval which is a security..
How to use Python to login to a webpage and retrieve cookies for later usage? http://stackoverflow.com/questions/189555/how-to-use-python-to-login-to-a-webpage-and-retrieve-cookies-for-later-usage to login over https to the webpage first. The login moment involves sending two POST params username password to login.php. During..
access ElementTree node parent node http://stackoverflow.com/questions/2170610/access-elementtree-node-parent-node
CPython - Internally, what is stored on the stack and heap? http://stackoverflow.com/questions/2353552/cpython-internally-what-is-stored-on-the-stack-and-heap here in the documentation Memory management in Python involves a private heap containing all Python objects and data structures...
Why does python use two underscores for certain things? http://stackoverflow.com/questions/3443043/why-does-python-use-two-underscores-for-certain-things cases there is a special procedure which at some point involves calling the respective method for example __getattr__ is only..
How do you return multiple values in Python? http://stackoverflow.com/questions/354883/how-do-you-return-multiple-values-in-python found myself going the dictionary route because it involves less set up work. From a types perspective however you might..
Concatenating two lists - difference between '+=' and extend() http://stackoverflow.com/questions/3653298/concatenating-two-lists-difference-between-and-extend only difference on a bytecode level is that .extend way involves function call which is slightly more expensive in Python than..
Is there any built-in way to get the length of an iterable in python? http://stackoverflow.com/questions/390852/is-there-any-built-in-way-to-get-the-length-of-an-iterable-in-python structure. Finding the length is an O n operation that involves iterating the whole list to find the number of elements. As..
Driving Excel from Python in Windows http://stackoverflow.com/questions/441758/driving-excel-from-python-in-windows produce complicated models. I'm working on a project that involves slightly tweaking various inputs and seeing the results. Rather..
C++ string parsing (python style) http://stackoverflow.com/questions/536148/c-string-parsing-python-style me I've written a lexer in D pretty much like C which involves reading some text char by char and recognizing tokens it's just..
Why is it “Easier to ask forgiveness than permission” in python, but not in Java? [closed] http://stackoverflow.com/questions/6092992/why-is-it-easier-to-ask-forgiveness-than-permission-in-python-but-not-in-java a file in Java are missing two important facts Each check involves a syscall and the sum of the extra syscalls is probably as expensive..
Variable assignment and modification (in python) http://stackoverflow.com/questions/6793872/variable-assignment-and-modification-in-python share improve this question Memory management in Python involves a private heap memory location containing all Python objects..
How to get indices of N maximum values in a numpy array? http://stackoverflow.com/questions/6910641/how-to-get-indices-of-n-maximum-values-in-a-numpy-array 1 3 2 4 5 In 3 arr.argsort 3 1 Out 3 array 4 3 1 This involves a complete sort of the array. I wonder if numpy provides a built..
Which is faster, python webpages or php webpages? http://stackoverflow.com/questions/77086/which-is-faster-python-webpages-or-php-webpages speed. You must recognize that the question of speed here involves many moving parts. Fortunately many of these parts can be independently..
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