正则表达式，表示“不在值列表中”，且不带负前瞻

Question

I want to search for a string that doesn't exist in a list of strings by using regex. Is it possible to make a regex for that case without using negative lookahead ?

Answer 1

只需将正则表达式用于“在值列表中”，如果匹配则返回False 。

Answer 2

When you just search for a plain string in a list of strings you don't even need regex. you can just do string not in list_of_strings

For example if you have

list_of_string = ['string1', 'string2', 'string3']
string = 'string4'

string not in list_of_strings would result in True