Computing greatest common denominator in python

If you have a list of integers in python, say L = [4,8,12,24], how can you compute their greatest common denomina开发者_高级运维tor/divisor (4 in this case)?

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One way to do it is:

import fractions

def gcd(L):
    return reduce(fractions.gcd, L)

print gcd([4,8,12,24])