SWI-Prolog -- py

Availability::- use_module(library(janus)).(can be autoloaded)

[det]py_free(+Obj)

Immediately free (decrement the reference count) for th Python object Obj. Further reference to Obj using py_call/1,2 or py_free/1 raises an existence_error. Note that by decrementing the reference count, we make the reference invalid from Prolog. This may not actually delete the object because the object may have references inside Python.

Prolog references to Python objects are subject to atom garbage collection and thus normally do not need to be freed explicitly.