# -*- coding: utf-8 -*-
"""
用来测试Python之中的私有和公有方法和变量的特性
由如下的测试可以得知
_xxx:单下划线的方法,变量等,可以被子类访问,它相当于是protected类型
__xxx:双下划线的方法,变量等,不可以可以被子类访问,而且不可以在类定义之外访问,它相当于是private类型的
"""


class PrivateAndPublic():
 _name = "zuiguangyin" # 弱内部使用,protected
 _age = 24 # 弱内部使用,protected
 __address = "重庆" # 私有变量,private
 __nickname = "最光阴" # 私有变量,private

 def __init__(self, dream):
 self.dream = dream

 # 私有方法
 def _set(self, name, age, address, nickname):
 self._name = name
 self._age = age
 self.__address = address
 self.__nickname = nickname

 def _get(self):
 self.__get() # 只能在内部调用

 def __get(self):
 print("private method: " + self._name + "," + str(
 self._age) + "," + self.__address + "," + self.__nickname + ",")

 def print1(self):
 print(self._name + "," + str(self._age) + "," + self.__address + "," + self.__nickname + ",")

 def print2(self):
 print(self.dream)


class PrivateAndPublicChild(PrivateAndPublic):
 def __init__(self, dream, timeline):
 super().__init__(dream)
 self.timeline = timeline

 def print2(self):
 print(self.dream + ", " + self.timeline)


if __name__ == "__main__":
 # 父类
 print("======" + "父类")
 private_and_public = PrivateAndPublic("have a good life")
 print(private_and_public.dream) # 访问成员变量
 private_and_public.print1() # 访问成员方法
 private_and_public._set("张三", 25, "广州", "狗蛋") # 访问私有方法
 private_and_public._get()
 # private_and_public.__get() # 无法直接调用
 private_and_public.print1()
 private_and_public.print2()
 # 子类
 print("======" + "子类")
 private_and_public_child = PrivateAndPublicChild("become a great man", "10")
 private_and_public_child.print1() # 这是父类的效果
 private_and_public_child.print2() # 访问重写的后的方法
 PrivateAndPublic.print1(private_and_public_child) # 调用父类方法
 private_and_public_child._get()
 # private_and_public_child.__get() # 无法直接调用
 print(private_and_public_child.timeline)
 print(private_and_public_child._name)
 # print(private_and_public_child.__nickname) # 无法直接调用