class 继承

1. Person.py

class Person:
    def __init__(self,name,age):
        self.name = name
        self.age = age

    def __del__(self):
        print("person is reclaimed.")

    def wakeup(self,at):
        print("{0} wake up at {1} am".format(self.name,at))

mars = Person("xuefeifei", 30)
print(mars.name)
print(mars.age)
mars.wakeup(7)

2. Employee.py

from Person import Person


class Employee(Person):
    __counter = 0 #私有属性
    def __init__(self,name,age,work_id):
        Person.__init__(self,name,age)
        self.work_id = work_id
        Employee.__counter += 1

 

3. Main.py

from Employee import Employee

mars = Employee("xuefeifei",30,1109)
print(Employee._Employee__counter) #私有属性的调用