Compute GPA and honors
Input
s = Student('Ana', 'Bell', [4.0, 3.7]) s.average()
Output
3.85
Average of [4.0, 3.7] is (4.0 + 3.7)/2 = 3.85. The method returns the value rounded to 2 decimals.
Full lesson preview
Build a Student Record Class
Implement a Student class with common behaviors: full name, grade management, GPA calculation, and honors detection.
Python practice15 minClasses & Objects FundamentalsIntermediateLast updated April 7, 2026
Problem statement
Create a Student class to model a simple student record. The class should store a student's first and last name, an optional list of numeric grades (0.0 - 4.0 scale), and an optional student_id. Implement methods to return the student's full name, add a grade with validation, compute the GPA (average) rounded to two decimal places, return a letter grade based on the GPA, and determine if the student qualifies for honors. The add_grade method should return True when a valid grade is added and False for invalid inputs. The average method should return 0.0 when there are no grades.
Task
Learn to design a Python class with a constructor, instance attributes, instance methods, input validation, and simple business logic (GPA rounding and letter grade mapping).
Examples
Input format
You will construct Student objects and call instance methods. Examples: Student('John', 'Doe', [3.0, 4.0]).average()
Output format
Methods return values (strings, floats, or booleans). The test harness evaluates expressions and compares their string representation to the expected output.
Constraints
Grades must be numeric values between 0.0 and 4.0 inclusive. average() returns a float rounded to 2 decimal places. If there are no grades, average() must return 0.0. add_grade should return True when a grade is added, False otherwise. No external libraries.
Samples
Sample 1
Input
Student('John','Doe',[3.0,4.0,3.7]).letter_grade()
Output
B
The average is 3.57, which maps to letter grade 'B' with the mapping: A >= 3.7, B >= 3.0, C >= 2.0, D >= 1.0, else F.