def str2float(s): x = s.find('.') s = s[:x] + s[x+1:] y= len(s) dic_number = {'0':0, '1':1, '2':2, '3':3, '4':4, '5':5, '6':6, '7':7, '8':8, '9':9} def char2num(s): return dic_number[s] def fn(x, y): return x 10 + y return reduce(fn, map(char2num, s)) / (10*(y-x))
倒数第二句少了个星号，应该是x乘以10
星号显示有问题啊：倒数第二句少了个星号，应该是x乘以10，最后一句10的（y-x）次方，也少了一个星星
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wujinkongxu
def str2float(s): x = s.find('.') s = s[:x] + s[x+1:] y= len(s) dic_number = {'0':0, '1':1, '2':2, '3':3, '4':4, '5':5, '6':6, '7':7, '8':8, '9':9} def char2num(s): return dic_number[s] def fn(x, y): return x 10 + y return reduce(fn, map(char2num, s)) / (10*(y-x))