pyq

import pickle

class Date:

    def __init__(self, day, month, year):
        self.__day = day
        self.__month = month
        self.__year = year

    def show(self):
        print("{}/{}/{}".format(self.__day, self.__month, self.__year))

    def get_year(self):
        return self.__year


class Employee:

    def __init__(self, name, day, month, year):
        self.__name = name
        self.__birth_date = Date(day, month, year)

    def display(self):
        print("Name: {0}, ".format(self.__name), end=' ')
        self.__birth_date.show()

    def get_employee_name(self):
        return self.__name

    def get_year_birth_date(self):
        return self.__birth_date.get_year()


def add_employee():
    name = input("Enter the name of the employee: ")
    day = int(input("Enter the day of birth: "))
    month = int(input("Enter the month of birth: "))
    year = int(input("Enter the year of birth: "))
    return Employee(name, day, month, year)


def get_employee_index(employees):
    name = input("Enter employee name to delete: ")
    index = 0
    for e in employees:
        if e.get_employee_name() == name:
            return index
        index += 1
    return -1


def print_employees(employees):
    print("***********************************")
    for e in employees:
        e.display()
    print("***********************************")


def store_employees(employees):
    file = open("employees.dat", "ab")
    for e in employees:
        pickle.dump(e, file)
    file.close()


def load_employees():
    employees = []
    try:
        file = open("employees.dat", "rb")
        while True:
            try:
                employees.append(pickle.load(file))
            except EOFError:
                break
    except FileNotFoundError:
        pass
    return employees


def main():
    employees = []
    while True:
        choice = int(input("""
***********************MENU**********************
1- Add Employee
2- Delete Employee By Name
3- Print All Employees
4- Print Employees Less Than Year
5- Store Employee in Binary
6- Load Employee List from Binary
7- Exit
*************************************************
Please enter your choice:"""))
        if choice == 1:
            employees.append(add_employee())
        elif choice == 2:
            index = get_employee_index(employees)
            if index >= 0:
                del employees[index]
        elif choice == 3:
            print_employees(employees)
        elif choice == 4:
            store_employees(employees)
        elif choice == 6:
            employees += load_employees()
        elif choice == 7:
            break


main()