def trim(s):if len(s)==0:return swhile s[0]==' ':s=s[1:]if len(s)==0:return swhile s[-1] == ' ':s=s[:-1]if len(s)==0:return sreturn s
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时间:2022-11-16 06:01:33
def trim(s):if len(s)==0:return swhile s[0]==' ':s=s[1:]if len(s)==0:return swhile s[-1] == ' ':s=s[:-1]if len(s)==0:return sreturn s