正则表达式匹配仅包含特定字符的整个单词

发布时间：2020-12-14 06:06:31 所属栏目：百科来源：网络整理

导读：我想匹配仅包含已定义字符的整个单词(或字符串). 例如,如果字母是d,o,g： dog = matchgod = matchogd = matchdogs = no match (because the string also has an "s" which is not defined)gods = no matchdoog = matchgd = match 在这句话中： dog god ogd,d

我想匹配仅包含已定义字符的整个单词(或字符串).

例如,如果字母是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

…我期望在狗,上帝和o上匹配(不是ogd,因为s的逗号或狗)

解决方法

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 “,”
)
"""

（编辑：李大同）

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