Threading

Pymunk supports being imported and used on free-threaded CPython builds.

Individual Pymunk objects are not thread safe. Do not access the same Space, Body, Shape, Constraint, or callback data from multiple threads at the same time unless you protect that access with your own locks. This includes concurrent reads if another thread might mutate or destroy the same object.

It is expected to be safe to use separate Space instances from separate threads, as long as those spaces and the objects attached to them are not shared between threads.