from abc import ABC, abstractmethod

class Person(ABC):  # taka se pravi abstrakten class na Person
    @abstractmethod      #ne iskam nqkoi nqkyde da syzdava instancii ot prevozni sredstva, t.e ot osnovniq klas, primenro Person
    def __init__(self, name: str, last_name: str):
        self.first_name = name
        self.last_name = last_name

    def get_full_name(self):
        return f'{self.first_name} {self.last_name}'


class Employee(Person):
    def __init__(self, name: str, last_name: str, staff_num: str):
        Person.__init__(self, name, last_name) # вместо Person., може super().
        self.staff_num = staff_num

    def go_to_work(self):
        return "Working..."

    def get_full_name(self):
        Person.get_full_name(self)

e = Employee("Ines", "Ivanova", "1225a")
print(e.get_full_name())  #None връща