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作业

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Mario7788

#1 Created at ... [Delete] [Delete and Lock User]

用if琢磨了半天,还是借鉴讲解交个作业。

def trim(s):

  while s[0:1]==' ':

    s=s[1:]

  while s[(len(s)-1):len(s)]==' ':

    s=s[:-1]

  return s


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