How to Match a Literal Dot in a Python Regular Expression?

Matching a Literal Dot in a Regular Expression

In regex, a period (.) typically represents any character. However, when working with Python's raw format strings (prefixed with 'r'), a literal dot needs to be escaped. This is because escaped characters in raw strings are treated literally, overriding their special meanings in regex.

To match a dot in Python using regex, it must be preceded by an escape character (""). For instance:

import re

text = "blah blah blah test.thisis@example.com blah blah"
match = re.search(r"\.this", text)  # Escape the literal dot with "\."

if match:
    print(match.group())  # Output: .this

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