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去除空格循环

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Schmetterlingsnetz

#1 Created at ... [Delete] [Delete and Lock User] 
def trim(s):
    while s[:1]==' '    #首位空格循环
        s=s[1:]         #去除首位空格
    while s[-1:]==' '   #末位空格循环
        s=s[:-1]        #去除末位空格
    return(s)
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