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

Matching a Literal Dot with Regular Expressions

In Python, matching a literal dot (.) using raw strings (e.g., r"string") requires escaping to avoid treating it as a metacharacter that matches any character.

To match the string "test.this" from the input "blah blah blah [email protected] blah blah", you can use the following regular expression:

import re

pattern = r"\b\w\.\w@.*"
match = re.findall(pattern, "blah blah blah [email protected] blah blah")
print(match)

Here's a breakdown of the regular expression:

• b: Matches a word boundary (start or end of a word).
• w: Matches any word character (letter, digit, or underscore).
• .: Matches a literal dot (escaped to prevent it from matching any character).
• w: Matches any word character again.
• @: Matches the @ symbol.
• .*: Matches any number of characters (including none), which captures the remaining part of the email address.

The re.findall() function returns a list of all matching substrings in the input string. In this case, it will return a list containing the matched string "test.this@...".

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