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作业

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YuanYin233X

#1 Created at ... [Delete] [Delete and Lock User] 
def trim(s):
    if len(s) == 0 or s.isspace():        return ''    while s[0] == ' ':        s = s[1:]    while s[-1] == ' ':        s = s[:-1]    return s

野辺叶生

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

 如果s在循环中变成空的话判断的时候不会报错吗？

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