BOKAS Contributors: Maksym Chernozhukov (MC) Myeong Ho (MH) Maksym Chernozhukov (MC) files: constants.py courses.py problem.py program_offering.py testing_code_MC.py training_program.py Myeong Ho (MH) files: code_test_item.py code_test_session.py courses.py db_connector.py users.py