Using Composition in Python to Separate Concerns

Create a file named quiz.py that contains the implementation for the Quiz class.

The class must have the following attributes:

• questions : A list of questions to display to the user.
• passing_percent: The percentage of questions that must be correct to pass the quiz.
• actual_score: The number of questions that were answered correctly.

The Quiz class is responsible for doing the following:

• Randomly displaying questions one at a time to the user by using the start method. While a question is presented, the application should wait for user input and set the resulting message as the answer for the question before moving to the next question.
• Calculating the number of total correct answers using the score method. This should set the actual_score attribute and return the value.
• Returning whether or not the quiz was passed using the grade method. The return value should be a tuple with the type of (float, bool), the actual percentage of questions that were answered correctly, and the pass/fail status.

Run the automated tests for the Quiz class using the following command:

$ python -m unittest test_quiz.TestQuiz

....
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Ran 4 tests in 0.000s

OK

The EssayQuestion class needs to implement the same methods as the Question, TrueFalseQuestion, and MultipleSelectionQuestion classes, but it will be simpler and shouldn't be a subclass of Question.

Create a file named essay_question.py that contains the implementation for the EssayQuestion class.

The class must have the following attributes:

• question_text : The question itself.
• answer : The user's response.
• answer_is_sufficient : Whether the answer correctly answers the question.

The class is responsible for doing the following:

• Printing to the screen: When cast to a str, the question should return the question_text.
• Setting the answer: The select method should take an argument, ensure that it is a string, and set it as the value for answer.
• Prompt for manual grading : The grade method should print the question_text and the provided answer while prompting the grader with the question "Is this answer sufficient? [Yn]: " (or something similar). The response should be read and then answer_is_sufficient should be set to the boolean value before also returning that boolean value from the function.

There is a single test in the test_quiz.py file that utilizes this class, so once all of the tests are passing, you can feel confident that you've implemented the class correctly.