Skip to content

gh-139316: Docs: Clarify behavior of regular expression pattern caching as it relates to re.compile #139317

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Closed
wants to merge 1 commit into from
Closed

gh-139316: Docs: Clarify behavior of regular expression pattern caching as it relates to re.compile #139317

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
13 changes: 9 additions & 4 deletions Doc/library/re.rst
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -915,10 +915,15 @@ Functions

.. note::

The compiled versions of the most recent patterns passed to
:func:`re.compile` and the module-level matching functions are cached, so
programs that use only a few regular expressions at a time needn't worry
about compiling regular expressions.
In addition to caching patterns passed to :func:`re.compile`,
the module maintains a small internal cache of regular
expressions passed to matching functions such as
:func:`re.search`, :func:`re.match`, and :func:`findall`,
even if the regular expressions were passed to
those functions as strings. Therefore, programs that use only
a few regular expressions at a time needn't worry about
compiling regular expressions.



.. function:: search(pattern, string, flags=0)
Expand Down
Loading