Custom function for the function sorted in python 3.x

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#1 by (2 votes)

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In python 2.x I can pass a custom function to sorted function, how to do this in python 3.x?

Basically convert the code below

def numeric_compare(x, y):
    return x - y

print(sorted([5, 2, 4, 1, 3], cmp=numeric_compare) )

python-3.x

asked by anonymous 02.01.2018 / 02:40

1 answer

score 2 · Accepted Answer

Use the cmp_to_key method of the functools library It will look like this:

import functools
def numeric_compare(x, y):
    return x - y

print(sorted([5, 2, 4, 1, 3], key=functools.cmp_to_key(numeric_compare)))