终于搞清楚了……
from functools import reduce def str2float(s): def str2float_sub(s): d = {'0':0, '1':1, '2':2, '3':3, '4':4, '5':5, '6':6, '7':7, '8':8, '9':9, '.':'dot'} return d[s] b = list(map(str2float_sub, s)) print (b) c = b.index('dot') print (c) b.pop(c) print (b) def fn(x, y): return x * 10 + y return reduce(fn, b)/10**c print (str2float('43112.43124'))
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Swordinstone
终于搞清楚了……