类的装饰器
Posted chrrydot
tags:
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实现给类添加属性
def Typed(**kwargs):
def deco(obj):
for key,val in kwargs.items():
# obj.key = val
setattr(obj,key,val)
return obj
print(‘==>‘,kwargs)
return deco
@Typed(x=1,y=2,z=3)
class Foo:
pass
# f = Foo()
print(Foo.__dict__) #给Foo类添加属性成功
#{‘__module__‘: ‘__main__‘, ‘__dict__‘: <attribute ‘__dict__‘ of ‘Foo‘ objects>, ‘__weakref__‘: <attribute ‘__weakref__‘ of ‘Foo‘ objects>, ‘__doc__‘: None, ‘x‘: 1, ‘y‘: 2, ‘z‘: 3}
@Typed(name=‘ago‘)
class Bar:
pass
print(Bar.__dict__)
‘‘‘
==> {‘x‘: 1, ‘y‘: 2, ‘z‘: 3}
{‘__module__‘: ‘__main__‘, ‘__dict__‘: <attribute ‘__dict__‘ of ‘Foo‘ objects>, ‘__weakref__‘: <attribute ‘__weakref__‘ of ‘Foo‘ objects>, ‘__doc__‘: None, ‘x‘: 1, ‘y‘: 2, ‘z‘: 3}
==> {‘name‘: ‘ago‘}
{‘__module__‘: ‘__main__‘, ‘__dict__‘: <attribute ‘__dict__‘ of ‘Bar‘ objects>, ‘__weakref__‘: <attribute ‘__weakref__‘ of ‘Bar‘ objects>, ‘__doc__‘: None, ‘name‘: ‘ago‘}
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