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第三题

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#1 Created at ... [Delete] [Delete and Lock User]

from functools import reduce

def str2float(str): digits = {'0': 0, '1': 1, '2': 2, '3': 3, '4': 4, '5': 5, '6': 6, '7': 7, '8': 8, '9': 9} dot = str.index('.')

def str2num(s):
    return digits[s]
def fn(x,y):
    return x * 10 + y
return reduce(fn, map(str2num, str[:dot]+str[dot+1:]))/10**dot

机修贾森

#2 Created at ... [Delete] [Delete and Lock User]

格式...

def str2float(str): digits = {'0': 0, '1': 1, '2': 2, '3': 3, '4': 4, '5': 5, '6': 6, '7': 7, '8': 8, '9': 9} dot = str.index('.')

def str2num(s):
    return digits[s]
def fn(x,y):
    return x * 10 + y
return reduce(fn, map(str2num, str[:dot]+str[dot+1:]))/10**dot
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