要求去除字符串首尾的空格。
def trim(s): while s[:1] == ‘ ‘: s = s[1:] while s[-1:] == ‘ ‘: s = s[:-1] return s
要求去除字符串首尾的空格。
def trim(s): while s[:1] == ‘ ‘: s = s[1:] while s[-1:] == ‘ ‘: s = s[:-1] return s
原文：https://www.cnblogs.com/immjc/p/8410765.html