第三题
from functools import reduce
def str2float(s): def f1(x,y): return x10+y def g1(t): return {'0': 0, '1': 1, '2': 2, '3': 3, '4': 4, '5': 5, '6': 6, '7': 7, '8': 8, '9': 9}[t] p1=reduce(f1,map(g1,s[0:s.index('.')])) p2=reduce(f1,map(g1,s[s.index('.')+1:]))/(10*len(s[s.index('.')+1:])) return p1+p2
print('str2float(\'123.456\') =', str2float('123.456'))
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wake-upYC
第三题
from functools import reduce
def str2float(s): def f1(x,y): return x10+y def g1(t): return {'0': 0, '1': 1, '2': 2, '3': 3, '4': 4, '5': 5, '6': 6, '7': 7, '8': 8, '9': 9}[t] p1=reduce(f1,map(g1,s[0:s.index('.')])) p2=reduce(f1,map(g1,s[s.index('.')+1:]))/(10*len(s[s.index('.')+1:])) return p1+p2
print('str2float(\'123.456\') =', str2float('123.456'))