使用正则表达式检查整个字符串 [英] Checking whole string with a regex

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 = re.compile("\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()

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