How to insert special character in a string given a full list in Python?

I have a list that contains some strings that have ‘\’ in them.

Ex:

'PEOPLE\\S BANK', 'PRIME MINISTER\\S'

I would like to add a single quote after every string that contains a \ in them.

Ive tried

import re
tt = re.sub(r'(\\)', r'\1"', str(updated_unique_accts))

This just adds a " between each . Any thoughts? There are multiple strings that contain this pattern.

Desired output

'PEOPLE\\'S BANK', 'PRIME MINISTER\\'S'

>Solution :

You’re very close, you just need to remember that both ' and " can be used for strings in python:

for line in updated_unique_accts:
    tt = re.sub(r'(\\\\)', r"\1'", line)