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#!/usr/bin/env python
# encoding: utf-8
"""
utils.py
Created by Jason Sundram, on 2010-04-05.
"""
def flatten(l):
""" Converts a list of tuples to a flat list.
e.g. flatten([(1,2), (3,4)]) => [1,2,3,4]
"""
return [item for pair in l for item in pair]
def tuples(l, n=2):
""" returns n-tuples from l.
e.g. tuples(range(4), n=2) -> [(0, 1), (1, 2), (2, 3)]
"""
return zip(*[l[i:] for i in range(n)])
def rows(m):
"""returns the # of rows in a numpy matrix"""
return m.shape[0]
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