re is an ordinary standard Python library — https://docs.python.org/3/library/re...

makapuf · on Oct 8, 2021

re depends ultimately of this c file https://github.com/python/cpython/blob/main/Modules/_sre.c

igouy · on Oct 8, 2021

And? CPython is implemented in C.

Here's some of a comment from _operator.c

"This module exports a set of functions implemented in C corresponding\n\ to the intrinsic operators of Python. For example, operator.add(x, y)\n\ is equivalent to the expression x+y."

Why wouldn't you expect that CPython regex would "ultimately" be written in C?