python Programming Glossary: sum2

What is wrong with this python function from “Programming Collective Intelligence”?

http://stackoverflow.com/questions/1423525/what-is-wrong-with-this-python-function-from-programming-collective-intelligenc

si 0 return 0 n len si sum1 sum prefs p1 it for it in si sum2 sum prefs p2 it for it in si sum1Sq sum pow prefs p1 it 2 for.. it for it in si sum1Sq sum pow prefs p1 it 2 for it in si sum2Sq sum pow prefs p2 it 2 for it in si pSum sum prefs p1 it prefs.. sum prefs p1 it prefs p2 it for it in si num pSum sum1 sum2 n den sqrt sum1Sq pow sum1 2 n sum2Sq pow sum2 2 n if den 0..

How to calculate cosine similarity given 2 sentence strings? - Python

http://stackoverflow.com/questions/15173225/how-to-calculate-cosine-similarity-given-2-sentence-strings-python

for x in intersection sum1 sum vec1 x 2 for x in vec1.keys sum2 sum vec2 x 2 for x in vec2.keys denominator math.sqrt sum1 math.sqrt.. 2 for x in vec2.keys denominator math.sqrt sum1 math.sqrt sum2 if not denominator return 0.0 else return float numerator denominator..

Python: Why is functools.partial necessary?

http://stackoverflow.com/questions/3252228/python-why-is-functools-partial-necessary

x y x y sum 1 2 3 incr lambda y sum 1 y incr 2 3 def sum2 x y return x y incr2 functools.partial sum2 1 incr2 4 5 Is functools.. y incr 2 3 def sum2 x y return x y incr2 functools.partial sum2 1 incr2 4 5 Is functools somehow more efficient or readable..