Python Day 12 : Inheritance | HackerRank 30 Days of Code Solutions

 Task

You are given two classes, Person and Student, where Person is the base class and Student is the derived class. Completed code for Person and a declaration for Student are provided for you in the editor. Observe that Student inherits all the properties of Person.

Complete the Student class by writing the following:

• A Student class constructor, which has  parameters:
  1. A string, .
  2. A string, .
  3. An integer, .
  4. An integer array (or vector) of test scores, .
• A char calculate() method that calculates a Student object's average and returns the grade character representative of their calculated average:

Code:

class Person:

    def __init__(self, firstName, lastName, idNumber):

        self.firstName = firstName

        self.lastName = lastName

        self.idNumber = idNumber

    def printPerson(self):

        print("Name:", self.lastName + ",", self.firstName)

        print("ID:", self.idNumber)

class Student(Person):

    def __init__(self, firstName, lastName, idNumber, testScores):

        super().__init__(firstName, lastName, idNumber)

        self.testScores = testScores

    def calculate(self):

        total = 0

        for testScore in self.testScores:

            total += testScore

        avg = total / len(self.testScores)

        if 90 <= avg <= 100:

            return 'O'

        if 80 <= avg < 90:

            return 'E'

        if 70 <= avg < 80:

            return 'A'

        if 55 <= avg < 70:

            return 'P'

        if 40 <= avg < 55:

            return 'D'

        return 'T'    

line = input().split()

firstName = line[0]

lastName = line[1]

idNum = line[2]

numScores = int(input()) # not needed for Python

scores = list( map(int, input().split()) )

s = Student(firstName, lastName, idNum, scores)

s.printPerson()

print("Grade:", s.calculate())