Error "ModuleNotFoundError: No module named 'build_cinema_database'"

Full error:

Traceback (most recent call last): File "2_setup.py", line 6, in <module> import build_cinema_database ModuleNotFoundError: No module named 'build_cinema_database'

You did not copy build_cinema_database.py from the example to your current folder. Copy that file from the example to where you call 2_setup.py and it should work.