class Employee: def __init__(self, first, last, pay): self.first = first self.last = last self.email = first + '.' + last + '@email.com' self.pay = pay def fullname(self): return '{} {}'.format(self.first, self.last) class Manager(Employee): def __init__(self, first, last, pay, employees=None): super().__init__(first, last, pay) if employees is None: self.employees = [] else: self.employees = employees def add_emp(self, emp): if emp not in self.employees: self.employees.append(emp) def print_emps(self): for emp in self.employees: print('-->', emp.fullname()) class Developer(Employee): def __init__(self, first, last, pay, prog_lang): super().__init__(first, last, pay) self.prog_lang = prog_lang dev_1 = Developer('Masoud', 'Sadrnezhaad', 5000, 'Python') dev_2 = Developer('Test', 'Employee', 6000, 'Java') mgr_1 = Manager('Mostafa', 'Amiri', 1000, [dev_1]) mgr_1.add_emp(dev_2) print(mgr_1.print_emps()) help(dev_1)