从 Python 中的字符串列表确定一个常见的正则表达式模式

Question

I have a list of different strings. I would like to find out a common regex expression (if any) for that list using Python.
For example, my list contains the following strings:

myList = ['This is first string', 'This is 2nd String', 'This is string 3', 'This is a final string']

Then I would like to programmatically determine if there is a regex expression which will match all the strings in the list. For instance, here the expression is something like 'This is *'. Will it be possible to do this programmatically?

Answer 1

use operator | to join together each literal match. place inside ^(...)$

pattern = "^(" + "|".join(re.escape(item) for item in myStrings) + ")$"

Answer 2

它很简单， /\\'This is ([a-zA-Z0-9])*\\'/ /This is ([a-zA-Z0-9])*/不需要引号/\\'This is ([a-zA-Z0-9])+\\'/ - 任何东西都必须在 This is 之后。