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第三题

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用户6386657610

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# _*_ coding: utf-8 _*_

from functools import reduce

def str2float(s):
    L = s.split('.')

    return reduce(lambda x, y:x*10+y, map(int, L[0])) + reduce(lambda x, y: x*10+y, map(int,L[1]))/(10**(len(L[1])))
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