使用正则表达式检查整个字符串

本文介绍了使用正则表达式检查整个字符串的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我正在尝试检查字符串是否为数字，因此正则表达式 "\d+" 看起来不错.但是，由于某种原因，该正则表达式也适合78.46.92.168:8000"，这是我不想要的，有一点代码:

I'm trying to check if a string is a number, so the regex "\d+" seemed good. However that regex also fits "78.46.92.168:8000" for some reason, which I do not want, a little bit of code:

class Foo(): _rex = repile("\d+") def bar(self, string): m = _rex.match(string) if m != None: doStuff()

当输入ip地址时调用doStuff().我有点困惑，."怎么办?还是:"匹配\d"?

And doStuff() is called when the ip adress is entered. I'm kind of confused, how does "." or ":" match "\d"?

推荐答案

\d+ 匹配字符串内的任意正数位数，因此它匹配第一个 78 并成功.

\d+ matches any positive number of digits within your string, so it matches the first 78 and succeeds.

使用^\d+$.

或者，更好:"78.46.92.168:8000".isdigit()