person_two_classes.py

class Student:
    def __init__(self, name, student_id, grade):
        self.name = name
        self.student_id = student_id
        self.grade = grade

    def register_course(self, course):
        pass

    def load_account(self, amount):
        # fetch the amount from the server
        current_balance = 100
        current_balance += amount
        # save the new balance to the server

    def check_in(self, arriving_time):
        record_time = arriving_time
        required_time = "08:00"
        on_time = record_time <= required_time
        # save the data to the database

class Teacher:
    def __init__(self, name, staff_id, course_covered):
        self.name = name
        self.staff_id = staff_id
        self.course_covered = course_covered

    def request_vacation(self, start_date, duration):
        pass

    def load_account(self, amount):
        # fetch the amount from the server
        current_balance = 100
        current_balance += amount
        # save the new balance to the server

    def check_in(self, arriving_time):
        record_time = arriving_time
        required_time = "07:30"
        on_time = record_time <= required_time
        # save the data to the database