user:file_search_path(library, '../prolog_call_python').
:- use_module(library(python_lib)).
run hello_world.py and call Result = say_hello()
?- python_call('hello_world', 'say_hello', Result).
Result = hello.
run hello_world.py and call Result = say('good')
?- python_call('hello_world', 'say', 'good', Result).
Result = good.