Python: deleting a class attribute in a subclass

I have a subclass and I want it to not include a class attribute that's present on the base class.

I tried this, but it doesn't work:

>>> class A(object):
...     x = 5
>>> class B(A):
...     del x
Traceback (most recent call last):
  File "<pyshell#1>", line 1, in <module>
    class B(A):
  File "<pyshell#1>", line 2, in B
    del x
NameError: name 'x' is not defined

How can I do this?

You can use delattr(class, field_name) to remove it from the class definition.

You don't need to delete it. Just override it.

class B(A):
   x = None

or simply don't reference it.

Or consider a different design (instance attribute?).

Maybe you could set x as property and raise AttributeError whenever someone try to access it.

>>> class C:
        x = 5

>>> class D(C):
        def foo(self):
             raise AttributeError
        x = property(foo)

>>> d = D()
>>> print(d.x)
File "<pyshell#17>", line 3, in foo
raise AttributeError
AttributeError