def trim(s): a=len(s) if a==0: None else: while s[0]==' ': a=a-1 if a==0: s='' break else: s=s[1:] if a!=0: while s[-1]==' ': a=a-1 s=s[:a] return s
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咕咚国王的萝卜嘞
def trim(s): a=len(s) if a==0: None else: while s[0]==' ': a=a-1 if a==0: s='' break else: s=s[1:] if a!=0: while s[-1]==' ': a=a-1 s=s[:a] return s