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

while(s[:1] == ' '):

s = s[1:]

while(s[-1:] == ' '):

s = s[:-1]

return s

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

厉害，这么简练，一下就通过了

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

问你一下：你说空格是只占一个格吗？

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

他这个写的真的可以

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

这个while用的妙啊

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

不错不错，可以的

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

请问用while和if有区别么

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

但是多次使用了切片，效率上不会太好

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

为什么这里的while不需要计数呀，比如i = i+1这样子的，难道是因为多个空格只占一个位置吗？

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

可以把括号去掉

def trim(s):
    while s[:1]==' ':
        s=s[1:]
    while s[-1:]==' ':
        s=s[:-1]
    return s