类的装饰器基本原理及增强版

‘‘‘类的装饰器基本原理‘‘‘
# def deco(func):
#  print(‘===‘)
#  return func

# @deco    # test = deco(test)
# def test():
#  print(‘test函数运行‘)
#
# test()

# @deco    # Foo = deco(Foo)
# class Foo:
#  pass
#
# f1 = Foo()


# def deco1(func):
#  func.x = 1
#  func.y = 2
#  return func
#
# @deco1    # Foo1 = deco1(Foo1)
# class Foo1:
#  pass
#
# print(Foo1.__dict__)


‘‘‘类的装饰器增强版‘‘‘
# def typed(**kwargs):
#  def deco(func): # 此时deco是局部作用域
#     for key,val in kwargs.items():
#        setattr(func, key, val) # 为类设置类属性
#     return func
#  return deco
#
# @typed(name=‘alex‘, age=18) # ①typed(name=‘alex‘, age=18)已经是在运行了，返回结果deco ②@deco，Foo = deco(Foo)
# class Foo:
#  pass
#
# @typed(x=1, y=2, z=3)
# class Bar:
#  pass
#
# print(Foo.__dict__)
# print(Bar.__dict__)

类的装饰器基本原理及增强版

原文：https://www.cnblogs.com/xuewei95/p/14756751.html