def trim(s): while s[:1]==' ': s=s[1:len(s)] while s[len(s)-1:len(s)]==' ': s=s[:len(s)-1] return s
你好，请问上面的代码如果碰到字符串前后都有空格，能否把前后的空格同时去掉吗？能否帮忙分析一下？谢谢
搞明白了
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Dokuroo
def trim(s): while s[:1]==' ': s=s[1:len(s)] while s[len(s)-1:len(s)]==' ':
s=s[:len(s)-1]
return s