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python Programming Glossary: twoWhat is a metaclass in Python? http://stackoverflow.com/questions/100003/what-is-a-metaclass-in-python a class. I know it's silly that the same function can have two completely different uses according to the parameters you pass.. simple class alterations. You can change classes by using two different techniques monkey patching class decorators 99 of..
The meaning of a single- and a double-underscore before an object name in Python http://stackoverflow.com/questions/1301346/the-meaning-of-a-single-and-a-double-underscore-before-an-object-name-in-python the Python docs Any identifier of the form __spam at least two leading underscores at most one trailing underscore is textually..
http://stackoverflow.com/questions/13058458/python-list-index just the reference to it. This means that you can have two variables pointing to the same list in memory a 1 b a a 0 2..
Why does comparing strings in Python using either '==' or 'is' sometimes produce a different result? http://stackoverflow.com/questions/1504717/why-does-comparing-strings-in-python-using-either-or-is-sometimes-produce a different result I've got a python program where two variables are set to the value 'public' . In a conditional expression..
Differences between isinstance() and type() in python http://stackoverflow.com/questions/1549801/differences-between-isinstance-and-type-in-python and type in python What are the differences between these two code fragments Which way is considered to be more pythonic Using..
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 the webpage first. The login moment involves sending two POST params username password to login.php. During the login..
The Python yield keyword explained http://stackoverflow.com/questions/231767/the-python-yield-keyword-explained generator will be considered empty # there is no more than two values the left and the right children Caller # Create an empty.. iterables. Ever wish to duplicate a generator Chain two generators Group values in a nested list with a one liner Map..
Python “is” operator behaves unexpectedly with integers http://stackoverflow.com/questions/306313/python-is-operator-behaves-unexpectedly-with-integers the leaky abstraction What is a better way of comparing two arbitrary objects to see whether they are the same and I don't..
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 some obvious ways to do this like keeping a counter and two lists and when the second list fills up add it to the first..
How can I merge (union) two Python dictionaries in a single expression? http://stackoverflow.com/questions/38987/how-can-i-merge-union-two-python-dictionaries-in-a-single-expression can I merge union two Python dictionaries in a single expression I have two Python.. two Python dictionaries in a single expression I have two Python dictionaries and I want to write a single expression.. and I want to write a single expression that returns these two dictionaries merged. The update method would be what I need..
http://stackoverflow.com/questions/509211/pythons-slice-notation the beginning. So a 1 # last item in the array a 2 # last two items in the array a 2 # everything except the last two items.. two items in the array a 2 # everything except the last two items Python is kind to the programmer if there are fewer items..
Python rounding error with float numbers http://stackoverflow.com/questions/5997027/python-rounding-error-with-float-numbers Any number that can't be built from exact powers of two can't be represented exactly as a floating point number it needs..
Good Python modules for fuzzy string comparison? http://stackoverflow.com/questions/682367/good-python-modules-for-fuzzy-string-comparison help Levenshtein.ratio ratio ... Compute similarity of two strings. ratio string1 string2 The similarity is a number between.. distance ... Compute absolute Levenshtein distance of two strings. distance string1 string2 Examples it's hard to spell..
How can I make a chain of function decorators in Python? http://stackoverflow.com/questions/739654/how-can-i-make-a-chain-of-function-decorators-in-python a chain of function decorators in Python How can I make two decorators in Python that would do the following @makebold @makeitalic..
Restricting Python's syntax to execute user code safely. Is this a safe approach? http://stackoverflow.com/questions/10661079/restricting-pythons-syntax-to-execute-user-code-safely-is-this-a-safe-approach python security ast share improve this question Two points I noticed that you could still improve You should always..
http://stackoverflow.com/questions/1151658/python-hashable-dicts with namedtuple s is that they are strictly positional. Two tuples that look like they should be different can in fact be..
Accessing object memory address http://stackoverflow.com/questions/121396/accessing-object-memory-address unique and constant for this object during its lifetime. Two objects with non overlapping lifetimes may have the same id..
Unrecognized or unsupported array type in function cvGetMat in python opencv http://stackoverflow.com/questions/14155081/unrecognized-or-unsupported-array-type-in-function-cvgetmat-in-python-opencv array im you're passing to cv2.imshow is poorly formed. Two ideas This could be caused by quirky behavior on your webcam.....
http://stackoverflow.com/questions/1456373/two-way-reverse-map way reverse map I'm doing this switchboard thing in python.. the logic that you want. Here's a basic example class TwoWayDict dict def __setitem__ self key value # Remove any previous.. 3 return int dict.__len__ self 2 And it works like so d TwoWayDict d 'foo' 'bar' d 'foo' 'bar' d 'bar' 'foo' len d 1 del..
'is' operator behaves differently when comparing strings with spaces http://stackoverflow.com/questions/16756699/is-operator-behaves-differently-when-comparing-strings-with-spaces is no it is not the whitespace . Not only the whitespace Two string literals will share memory if they are either alphanumeric..
http://stackoverflow.com/questions/1827489/numpy-meshgrid-in-3d from two coordinate vectors. Parameters x y ndarray Two 1 D arrays representing the x and y coordinates of a grid. Returns..
Elegant way to remove items from sequence in Python? http://stackoverflow.com/questions/18418/elegant-way-to-remove-items-from-sequence-in-python optimization sets series share improve this question Two easy ways to accomplish just the filtering are Using filter..
when does Python allocate new memory for identical strings? http://stackoverflow.com/questions/2123925/when-does-python-allocate-new-memory-for-identical-strings does Python allocate new memory for identical strings Two Python strings with the same characters a b may share memory..
Why the Global Interpreter Lock? http://stackoverflow.com/questions/265687/why-the-global-interpreter-lock locks. The coarse grained approach is the opposite. Two threads can't run at the same time but an individual thread..
http://stackoverflow.com/questions/2855378/ropemacs-usage-tutorial lookup path in order to provide better autocomplete. EDIT Two of the most important functions for me are looking up documentation..
String comparison in Python: is vs. == [duplicate] http://stackoverflow.com/questions/2988017/string-comparison-in-python-is-vs identity implies equality. The converse is not true Two distinct objects can have the same value. Also is it generally..
What are the differences between Perl, Python, AWK and sed? [closed] http://stackoverflow.com/questions/366980/what-are-the-differences-between-perl-python-awk-and-sed Perl was written in part as an awk killer and sed killer. Two of the programs provided with it are a2p and s2p for converting..
How to define Two-dimensional array in python http://stackoverflow.com/questions/6667201/how-to-define-two-dimensional-array-in-python to define Two dimensional array in python I want to define a Two dimensional.. define Two dimensional array in python I want to define a Two dimensional array without an initalized length like this Matrix..
How can you find unused functions in Python code? http://stackoverflow.com/questions/693070/how-can-you-find-unused-functions-in-python-code unused code by using dynamic or static code analyzers. Two examples for dynamic analyzers are coverage and figleaf . They.. percent accurate and you might want to double check them. Two tools that come to mind here are pyflakes and vulture . They..
http://stackoverflow.com/questions/766141/reverse-a-string-in-python you want as begin end step and it works for all sequences. Two neat things about it You can omit one or more of the elements..
What's the difference between `globals()`, `locals()`, and `vars()`? http://stackoverflow.com/questions/7969949/whats-the-difference-between-globals-locals-and-vars in test print d NameError global name 'd' is not defined Two notes This behavior is CPython specific other Pythons may allow..
How to print one character at a time on one line? http://stackoverflow.com/questions/9246076/how-to-print-one-character-at-a-time-on-one-line time.sleep .25 python share improve this question Two tricks here you need to use a stream to get everything in the..
python calculator program [closed] http://stackoverflow.com/questions/13664759/python-calculator-program NUMBER FOR CALCULATION if CHOICE 1 print 'ADDING TWO NUMBERS ' add c elif CHOICE 2 print 'SUBTRACTING TWO NUMBERS.. TWO NUMBERS ' add c elif CHOICE 2 print 'SUBTRACTING TWO NUMBERS ' sub c elif CHOICE 3 print 'MULTIPLYING TWO NUMBERS.. TWO NUMBERS ' sub c elif CHOICE 3 print 'MULTIPLYING TWO NUMBERS ' Mul c elif CHOICE 4 print DIVIDEING TWO NUMBERS Div..
Find out into how many values a return value will be unpacked http://stackoverflow.com/questions/16481156/find-out-into-how-many-values-a-return-value-will-be-unpacked asked for above. One cool usage of this trick would be ONE TWO THREE count ONE TWO THREE FOUR count with def count n get_return_count.. cool usage of this trick would be ONE TWO THREE count ONE TWO THREE FOUR count with def count n get_return_count if not n..
Why are default arguments evaluated at definition time in Python? http://stackoverflow.com/questions/1651154/why-are-default-arguments-evaluated-at-definition-time-in-python to achieve early binding as well a plus rather than giving TWO obvious ways to get late binding and no obvious way to get early..
http://stackoverflow.com/questions/3050298/parsing-email-with-python Content Type text plain charset ISO 8859 1 ONE TWO THREE I'm trying to parse the message in this way import email.. Content Type text plain charset ISO 8859 1 ONE TWO THREE then msg email.message_from_string msgtxt print msg 'Subject'..
How to print date in a regular format in Python? http://stackoverflow.com/questions/311627/how-to-print-date-in-a-regular-format-in-python not timestamps nor anything. Any object in Python have TWO string representations The regular representation that is used..
Types for which “is” keyword may be equivalent to equality operator in Python http://stackoverflow.com/questions/3218308/types-for-which-is-keyword-may-be-equivalent-to-equality-operator-in-python a a 2 b 1 Roughly equivalent to const int ONE 1 const int TWO 2 int a ONE int b a b points to 1 a TWO a points to 2 b still.. ONE 1 const int TWO 2 int a ONE int b a b points to 1 a TWO a points to 2 b still points to 1 share improve this answer..
How can I represent an 'Enum' in Python? http://stackoverflow.com/questions/36932/how-can-i-represent-an-enum-in-python type 'Enum' enums which is used like so Numbers enum ONE 1 TWO 2 THREE 'three' Numbers.ONE 1 Numbers.TWO 2 Numbers.THREE 'three'.. enum ONE 1 TWO 2 THREE 'three' Numbers.ONE 1 Numbers.TWO 2 Numbers.THREE 'three' You can also easily support automatic.. 'Enum' enums and used like so Numbers enum 'ZERO' 'ONE' 'TWO' Numbers.ZERO 0 Numbers.ONE 1 Support for converting the values..
Encoding error in Python with Chinese characters http://stackoverflow.com/questions/3883573/encoding-error-in-python-with-chinese-characters them fine. please explain what you mean. To me there are TWO criteria for a successful decoding firstly that raw_bytes.decode..
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