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python Programming Glossary: s1Why 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 interpreter and do the same is comparison it succeeds s1 'public' s2 'public' s2 is s1 True What am I missing here python.. is comparison it succeeds s1 'public' s2 'public' s2 is s1 True What am I missing here python share improve this question..
http://stackoverflow.com/questions/15541404/python-string-interning string True and thats pretty clever But you can't do this. s1 strin s2 string s1 g is s2 False Why wouldn't python evaluate.. pretty clever But you can't do this. s1 strin s2 string s1 g is s2 False Why wouldn't python evaluate s1 g realise it is.. s2 string s1 g is s2 False Why wouldn't python evaluate s1 g realise it is the same as s1 and point it to the same address...
Python and the Singleton Pattern [duplicate] http://stackoverflow.com/questions/42558/python-and-the-singleton-pattern args kwargs return cls._instance if __name__ '__main__' s1 Singleton s2 Singleton if id s1 id s2 print Same else print.. if __name__ '__main__' s1 Singleton s2 Singleton if id s1 id s2 print Same else print Different share improve this answer..
Creating a python dictionary from a line of text http://stackoverflow.com/questions/4356329/creating-a-python-dictionary-from-a-line-of-text ImportError # Python 3 izip zip def pairwise iterable s s0 s1 s2 s3 s4 s5 ... a iter iterable return izip a a Which can be.. listed right below pairwise def grouper n iterable s s0 s1 ...sn 1 sn sn 1 ...s2n 1 s2n s2n 1 ...s3n 1 ... return izip..
Iterating over every two elements in a list http://stackoverflow.com/questions/5389507/iterating-over-every-two-elements-in-a-list from itertools import izip def pairwise iterable s s0 s1 s2 s3 s4 s5 ... a iter iterable return izip a a for x y in pairwise.. from itertools import izip def grouped iterable n s s0 s1 s2 ...sn 1 sn sn 1 sn 2 ...s2n 1 s2n s2n 1 s2n 2 ...s3n 1 ..... in Python's own itertools documentation which yields s s0 s1 s1 s2 s2 s3 ... as pointed out by @lazyr in the comments. share..
Iterate a list as pair (current, next) in Python http://stackoverflow.com/questions/5434891/iterate-a-list-as-pair-current-next-in-python module docs import itertools def pairwise iterable s s0 s1 s1 s2 s2 s3 ... a b itertools.tee iterable next b None return.. module docs import itertools def pairwise iterable s s0 s1 s1 s2 s2 s3 ... a b itertools.tee iterable next b None return itertools.izip.. b None call . At this point a points to s0 and b points to s1. Both a and b can traverse the original iterator independently..
Rolling or sliding window iterator in Python http://stackoverflow.com/questions/6822725/rolling-or-sliding-window-iterator-in-python sliding window of width n over data from the iterable s s0 s1 ...s n 1 s1 s2 ... sn ... it iter seq result tuple islice it.. of width n over data from the iterable s s0 s1 ...s n 1 s1 s2 ... sn ... it iter seq result tuple islice it n if len result..
http://stackoverflow.com/questions/2101961/python-state-machine-design transitionRule self input return eval self.map input class S1 State map input S2 other S3 pass # Overrides to state specific.. Overrides to state specific methods class S2 State map foo S1 bar S2 class S3 State map quux S1 In some cases your event isn't.. class S2 State map foo S1 bar S2 class S3 State map quux S1 In some cases your event isn't as simple as testing objects..
Code Golf: Finite-state machine! [closed] http://stackoverflow.com/questions/4661818/code-golf-finite-state-machine number of 0 s The alphabet is the set 0 1 . The states are S1 and S2. The transitions are S1 0 S2 S1 1 S1 S2 0 S1 and S2 1.. set 0 1 . The states are S1 and S2. The transitions are S1 0 S2 S1 1 S1 S2 0 S1 and S2 1 S2 . The input string is any binary.. 1 . The states are S1 and S2. The transitions are S1 0 S2 S1 1 S1 S2 0 S1 and S2 1 S2 . The input string is any binary number..
Python Check if one of the following items is in a list http://stackoverflow.com/questions/740287/python-check-if-one-of-the-following-items-is-in-a-list this question L1 2 3 4 L2 1 2 i for i in L1 if i in L2 2 S1 set L1 S2 set L2 S1.intersection S2 set 2 Both empty lists and.. 3 4 L2 1 2 i for i in L1 if i in L2 2 S1 set L1 S2 set L2 S1.intersection S2 set 2 Both empty lists and empty sets are False..
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