文章标题

1. 编写一个python脚本，判断用户输入的变量名是否合法?
   (首位为字母或下划线，其他为数字，字母或下划线)

#!/usr/bin/env python#coding:utf-8import strings=raw_input("please input string:")a=1while s[0] in string.letters+"_":    for i in  s[1:]:        if i in string.letters+string.digits+"_":            print "True"        else:            print"Flase"else:    print "Flase"

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