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Calculating arithmetic mean (one type of average) in Python
...eturn float(sum(numbers)) / max(len(numbers), 1)
>>> mean([1,2,3,4])
2.5
>>> mean([])
0.0
In numpy, there's numpy.mean().
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What is copy-on-write?
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edited Mar 27 '14 at 6:23
answered Feb 28 '11 at 12:24
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