def trim(s): k = 0 for i in s: if i != '0': break k += 1 s = s[k:] s = s[::-1] k = 0 for i in s: if i != '0': break k += 1 s = s[k:] s = s[::-1] return s
为了观察方便，将空格改为 0
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风过杀戮起
def trim(s): k = 0 for i in s: if i != '0': break k += 1 s = s[k:] s = s[::-1] k = 0 for i in s: if i != '0': break k += 1 s = s[k:] s = s[::-1] return s