# def trim(str): # 拿第一个 # if str[0:1] == ' ': # str = str[1:] # 拿最后一个 # if str[-1:] == ' ': # str = str[:-1] # if str[0:1] == ' ' or str[-1:] == ' ': # return trim(str) # else: # return str def trim(str): if str[:1] == ' ': return trim(str[1:]) elif str[-1:] == ' ': return trim(str[:-1]) else: return str
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漫步云端丶衍