def trim(s): if len(s)==0: return s elif s[0]=='': return trim(s[1:]) elif s[-1]=='': return trim(s[:-1]) else: return s trim(' Hello') ' Hello'
def trim(s): if len(s)==0: return s elif s[0]=='': return trim(s[1:]) elif s[-1]=='': return trim(s[:-1]) else: return s
trim(' Hello') ' Hello'
为什么返回不到想要的结果呢
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纪小赟
为什么返回不到想要的结果呢