Can the comments produce errors in python?

[snippsat]

The problem is that you use \0 escape character that is a zero byte.
Inside f-string the r want work then nothing get printed after zero byte.
Can trick it together so it kind of work,but make it easier for yourself and don't use zero byte escape character as a replace.

import re

string1 = 'Agent Cheesecake was a double agent.'
agent_names_regex = re.compile(r'Agent (\w)\w*')
mo_0 = agent_names_regex.sub(r'\0**', string1)
print(fr"This is string1 '{string1}' with \0** after censorship: {mo_0!r}")

Output:
This is string1 'Agent Cheesecake was a double agent.' with \0** after censorship: '\x00** was a double agent.'