深入解析python中的实例方法、类方法和静态方法

class Game:

  @staticmethod
  def menu():
    print('------')
    print('开始[1]')
    print('暂停[2]')
    print('退出[3]')


Game.menu()

class Person:
  type = '人类'

  @classmethod
  def test(cls):
    print(cls.type)


Person.test()

class Goods:
  __discount = 1

  def __init__(self, name, price):
    self.name = name
    self.price = price

  @classmethod
  def change_discount(cls, new_discount):
    cls.__discount = new_discount

  @property
  def finally_price(self):
    return self.price * self.__discount


banana = Goods('香蕉', 10)
apple = Goods('苹果', 16)
Goods.change_discount(0.8)
print(banana.finally_price)
print(apple.finally_price)

Goods.change_discount(0.5)
print(banana.finally_price)
print(apple.finally_price)