UUID wrongly parses hex values with underscores

[sevdog]

Bug report

Bug description:

import uuid
uuid.UUID("123_4567812345678123456781234567")
#  UUID('01234567-8123-4567-8123-456781234567')

UUID parsing hex strings internally uses int method which from Python 3.6 accepts underscores (_) as digit separators

Changed in version 3.6: Grouping digits with underscores as in code literals is allowed.

Since the UUID does not performs sanitization of this character this may result in parsing as valid non-RFC compliant UUID values.

CPython versions tested on:

3.10, CPython main branch

Operating systems tested on:

Linux

Linked PRs

• gh-125651: Fix UUID hex parsing with underscores #125652