正则表达式匹配仅包含某些字符的整个单词

本文介绍了正则表达式匹配仅包含某些字符的整个单词的处理方法，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

我想匹配仅包含已定义字符的整个单词(或真正的字符串).

I want to match entire words (or strings really) that containing only defined characters.

例如如果字母是 d, o, g:

For example if the letters are d, o, g:

dog = match god = match ogd = match dogs = no match (because the string also has an "s" which is not defined) gods = no match doog = match gd = match

在这句话中:

dog god ogd, dogs o

...我希望匹配 dog、god 和 o(不是 ogd、由于逗号或 dogs 由于 s)

...I would expect to match on dog, god, and o (not ogd, because of the comma or dogs due to the s)

推荐答案

这应该适合你

\b[dog]+\b(?![,])

说明

r""" \b # Assert position at a word boundary [dog] # Match a single character present in the list "dog" + # Between one and unlimited times, as many times as possible, giving back as needed (greedy) \b # Assert position at a word boundary (?! # Assert that it is impossible to match the regex below starting at this position (negative lookahead) [,] # Match the character "," ) """