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使用isspace() 循环判断

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CR7呜啦啦

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def trim(s):    while True:        if s[:1].isspace() == True and s[-1:].isspace() == True:            s = s[1:len(s) - 1]        elif s[:1].isspace() == True and s[-1:].isspace() == False:            s = s[1:len(s)]        elif s[:1].isspace() == False and s[-1:].isspace() == True:            s = s[0:len(s) - 1]        else:            return s
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