Feature or enhancement

I propose adding a new function to the sys module to check if the GIL is current enabled:

sys._is_gil_enabled() -> bool

Return True if the GIL is currently enabled and False if the GIL is currently disabled.

The function would always return True in builds that do not support free-threading. In the free-threaded build, the the GIL might be dynamically enabled or disabled depending on imported modules.

EDIT: Changed name to use underscore prefix

Linked PRs

• gh-117514: Add sys._is_gil_enabled() function #118514