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作业3

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sparkipp

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from functools import reduce def str2float(s): def f1(x,y): return 10*x+y def f2(x,y): return x/10+y def num(x): return {'0': 0, '1': 1, '2': 2, '3': 3, '4': 4, '5': 5, '6': 6, '7': 7, '8': 8, '9': 9}[x] return reduce(f1,list(map(num,s.split('.')[0])))+reduce(f2,list(map(num,s.split('.')[1][::-1])))/10

str1='123.456' print('123.456 -->',str2float(str1))


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