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python Programming Glossary: pairwisePython: tf-idf-cosine: to find document similarity http://stackoverflow.com/questions/12118720/python-tf-idf-cosine-to-find-document-similarity Compressed Sparse Row format scikit learn already provides pairwise metrics a.k.a. kernels in machine learning parlance that work.. is also known as the linear kernel from sklearn.metrics.pairwise import linear_kernel cosine_similarities linear_kernel tfidf..
Working with big data in python and numpy, not enough ram, how to save partial results on disc? http://stackoverflow.com/questions/16149803/working-with-big-data-in-python-and-numpy-not-enough-ram-how-to-save-partial-r usefull libraries. I want to perform operations such as pairwise distance between all of the points and do clustering on all.. I run out of ram. Of course I do creating the matrix for pairwise distances on 200k data takes alot of memory. Here comes the.. libraries. I would like to be able to calculate the pairwise distance to all my points etc Is this feasible And how would..
How can you detect if two regular expressions overlap in the strings they can match? http://stackoverflow.com/questions/1849447/how-can-you-detect-if-two-regular-expressions-overlap-in-the-strings-they-can-ma an NFA that outputs pairs of symbols that are concatenated pairwise to match both an input and output string or to transform a given..
Map two lists into a dictionary in Python http://stackoverflow.com/questions/209840/map-two-lists-into-a-dictionary-in-python keys values print dictionary 'a' 1 'b' 2 'c' 3 Voila The pairwise dict constructor and zip function are awesomely useful http..
how best do I find the intersection of multiple sets in python? http://stackoverflow.com/questions/2541752/how-best-do-i-find-the-intersection-of-multiple-sets-in-python I can write a function to do it by performing a series of pairwise s1.intersection s2 etc. Is there a recommended better or built..
Creating a python dictionary from a line of text http://stackoverflow.com/questions/4356329/creating-a-python-dictionary-from-a-line-of-text pairs of values for the dict records. I got the idea for pairwise from a similarly named but functionally different recipe in.. import izip except ImportError # Python 3 izip zip def pairwise iterable s s0 s1 s2 s3 s4 s5 ... a iter iterable return izip.. in line.split ' ' # generator expression obj record dict pairwise fields records record 'TSN' record print 'Found d records in..
http://stackoverflow.com/questions/4628290/pairs-from-single-list these two suggestions from the answers to the tests def pairwise t it iter t return izip it it def chunkwise t size 2 it iter.. My favorite way to do it from itertools import izip def pairwise t it iter t return izip it it # for pairs of any length def..
Iterating over every two elements in a list http://stackoverflow.com/questions/5389507/iterating-over-every-two-elements-in-a-list python list share improve this question You need a pairwise or grouped implementation from itertools import izip def pairwise.. or grouped implementation from itertools import izip def pairwise iterable s s0 s1 s2 s3 s4 s5 ... a iter iterable return izip.. s2 s3 s4 s5 ... a iter iterable return izip a a for x y in pairwise l print d d d x y x y Or more generally from itertools import..
Iterate a list as pair (current, next) in Python http://stackoverflow.com/questions/5434891/iterate-a-list-as-pair-current-next-in-python from the itertools module docs import itertools def pairwise iterable s s0 s1 s1 s2 s2 s3 ... a b itertools.tee iterable..
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