Must be done in Python

Private Data Attributes

1. id: int

2. name:string

3. address:string

4. program:string

5. current_courses:[] # Contains a list of course IDs

6. completed_courses:{} # Contains a mapping from CourseID to marks obtained.

Properties:

1. name (getter only)

2. id (getter only)

3. address (getter and setter)

Derived Properties

1. average_score: Returns average score of all the completed courses. Return -1 if no courses have been completed.

Methods:

1. add_course. Takes a course id and adds to the list of current courses.

2. drop_course. Removes course id from list of courses if present, otherwise raise ValueError

3. course_completed: Takes course_id and marks_obtained and stores in the completed_courses dict if course_id in current_courses list.