COMPS III: Assignment #4 - Polymorphism and Encapsulation

Instructions

TASK: Create a Student parent class and two child classes (UndergraduateStudent and GraduateStudent). Student class has private attribute with relevant getter and setter methods. The UndergraduateStudent and GraduateStudent classes should override two of the methods present in the Student class.

Your Student class should have the following attributes and methods:

• Attribute
  • name (string): A string that contains the individual’s name.
  • major (string): An integer containing the individual’s age.
  • gpa_for_semesters (list): A list of GPAs values earned by the student. This attribute is private.
• Methods
  • __str__: Prints the string in the format “[name] is studying [major].”
  • get_gpa(): Returns the value stored in gpa_for_semesters.
  • set_gpa(new_value): Updates the values stored in gpa_for_semesters with the new_value.
  • calculate_average_gpa(): Calculates the average of the values stored in gpa_for_semesters and returns the value.
  • is_in_good_standing(): Prints a string in the format “[name] is a student.”

Your UndergraduateStudent class should inherit all of the attributes and methods of the Student class. The UndergraduateStudent override the following methods:

• Methods
  • __str__: Prints the string in the format “[name] is an undergraduate student studying [major].”
  • is_in_good_standing(): Overrides the existing method and implements the following functionality:
    • If the average GPA is 2.5 or more, the method should print: “[name] is in good academic standing.”
    • Otherwise, it should print: “[name] is not in good academic standing.”

Your GraduateStudent class should inherit all of the attributes and methods of the Student class. The GraduateStudent override the following methods:

• Methods
  • __str__: Prints the string in the format “[name] is a graduate student studying [major].”
  • is_in_good_standing(): Overrides the existing method and implements the following functionality:
    • If the average GPA is 3.0 or more, the method should print: “[name] is in good academic standing.”
    • Otherwise, it should print: “[name] is not in good academic standing.”

Grading Your Work

This assignment can grade itself! To setup the autograding, you should do the following:

1. Clone this file to your local machine using the command

git clone PASTE_URL_HERE

2. Open the downloaded file in your VS Code editor.
3. In the left hand sidebar, press the "Testing" menu represented by the picture of a flask.
4. Click "Configure Python Tests".
5. You'll have two options to select. Select pytest.
6. Select the folder where the tests live. You can simply select . Root directory.
7. You can now run the tests by pressing the play icon. A passing test will get a ✅ and a failing test will get a ❌.
8. Run the tests as you code and by the end it should be all ✅ if you have followed the specifications for this assignment!

Unit Tests

The tests use the following sample values to check your work

• Student
  • Name: "John"
  • Major: "Computer Science"
  • GPA for Semesters: [3.5, 4.0, 3.0]
• Student
  • Name: "Becky"
  • Major: "Mathematics"
  • GPA for Semesters: [2.5, 3.0, 3.5, 4.0, 3.0]
• UndergraduateStudent
  • Name: "Adama"
  • Major: "Marketing"
  • GPA for Semesters: [2.0, 3.3, 3.5]
• GraduateStudent
  • Name: "Ivan"
  • Major: "Math"
  • GPA for Semesters: [2.0, 3.3, 3.5]

Unit Test Explanations

• test_student: Tests that you can create an instance of Student with attributes of "John", "Computer Science", [3.5, 4.0, 3.0]. The instance has a str method that outputs "John is studying Computer Science."
• test_cannot_directly_access_gpa: Tests that you cannot directly access the gpa attribute.
• test_can_get_gpa: Tests that get_gpa() method returns the list of gpa values.
• test_can_set_gpa: Tests that set_gpa() method correctly updates the gpa value to the provided list.
• test_can_calculate_gpa: Tests that the calculate_gpa() method returns the average value for the list of gpas.
• test_in_good_standing: Test that is_in_good_standing() returns the correct string for instances of the Student class.
• test_undergraduate_student: Tests that an instance of the UndergraduateStudent class can be correctly created.
• test_undergraduate_polymorphism: Tests that the an instance of the UndergraduateStudent class has an updated __str__ and is_in_good_standing methods.
• test_graduate_student: Tests that an instance of the GraduateStudent class can be correctly created.
• test_graduate_polymorphism: Tests that the an instance of the UndergraduateStudent class has an updated __str__ and is_in_good_standing methods.