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终于成功了

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陈蔺川

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

    n=len(s)

    t=0

    r=0

    f=n

    while s[t:(t+1)]==' ':#计算s前面的t个" "

        t=t+1

    while s[(f-1):f]==' ':#计算s后面的r个" "

        r=r+1

        f=f-1

    return s[t:(n-r)]


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