Function has_chosen

pythonwhat/checks/has_funcs.py:812–852

Test multiple choice exercise. Test for a MultipleChoiceExercise. The correct answer (as an integer) and feedback messages are passed to this function. Args: correct (int): the index of the correct answer (should be an instruction). Starts at 1. msgs (list(str)): a list

(state, correct, msgs)

def has_chosen(state, correct, msgs):
    """Test multiple choice exercise.

    Test for a MultipleChoiceExercise. The correct answer (as an integer) and feedback messages
    are passed to this function.

    Args:
        correct (int): the index of the correct answer (should be an instruction). Starts at 1.
        msgs (list(str)): a list containing all feedback messages belonging to each choice of the
                          student. The list should have the same length as the number of options.
    """
    if not issubclass(type(correct), int):
        raise InstructorError.from_message(
            "Inside `has_chosen()`, the argument `correct` should be an integer."
        )

    student_process = state.student_process
    if not isDefinedInProcess(MC_VAR_NAME, student_process):
        raise InstructorError.from_message(
            "Option not available in the student process"
        )
    else:
        selected_option = getOptionFromProcess(student_process, MC_VAR_NAME)
        if not issubclass(type(selected_option), int):
            raise InstructorError.from_message("selected_option should be an integer")

        if selected_option < 1 or correct < 1:
            raise InstructorError.from_message(
                "selected_option and correct should be greater than zero"
            )

        if selected_option > len(msgs) or correct > len(msgs):
            raise InstructorError.from_message(
                "there are not enough feedback messages defined"
            )

        feedback_msg = msgs[selected_option - 1]

        state.reporter.success_msg = msgs[correct - 1]

        state.do_test(EqualTest(selected_option, correct, feedback_msg))