How to match any string from a list of strings in regular expressions in python?

Question

Lets say I have a list of strings,

string_lst = [\'fun\', \'dum\', \'sun\', \'gum\']

I want to make a regular expression, where at a point

Answer 1

You should make sure to escape the strings correctly before combining into a regex

>>> import re
>>> string_lst = ['fun', 'dum', 'sun', 'gum']
>>> x = "I love to have fun."
>>> regex = re.compile("(?=(" + "|".join(map(re.escape, string_lst)) + "))")
>>> re.findall(regex, x)
['fun']