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交作业

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RaidriarF

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

def trim(s):

    start = 0

    end = len(s)

    while start<end and s[start]==' ':

        start = start +1

    while start <end and s[end-1]==' ':

        end = end-1

    return(s[start:end])

sy107@CHINA

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

def trim(s):

    while True:

        if s[:1]==' ':

                s=s[1:]      

        elif s[-1:]==' ':

                s=s[:-1]

        else:

            break

    return s

这样行不行


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