我不确定Python是否允许我想要实现的东西。基本上,我尝试将一个默认对象分配给一个类,这样,如果您直接引用该类,它将返回该对象,否则它将访问该类的子对象。
以下是我试图在代码中实现的目标:
>>> class MyClass(object):
... a = 0
... b = 1
... def __new__(cls):
... return 2
>>> obj = MyClass()
>>> # I want it to print 0
>>> print obj.a
AttributeError: 'int' object has no attribute 'a'
>>> # I want it to print 1
>>> print obj.b
AttributeError: 'int' object has no attribute 'b'
>>> # I want it to print 2
>>> print obj
2
发布于 2018-12-06 04:51:53
您可以改为将int
子类化:
class MyClass(int):
a = 0
b = 1
def __new__(cls, value):
return super(MyClass, cls).__new__(cls, value)
因此:
obj = MyClass(2)
print(obj.a)
print(obj.b)
print(obj)
输出:
0
1
2
https://stackoverflow.com/questions/53640414
复制相似问题