__delitem__ "feature"

[Ian Kelly]

On 12/26/2010 10:53 AM, kj wrote:
> P.S. If you uncomment the commented-out line, and comment out the
> last line of the __init__ method (which installs self._delitem as
> self.__delitem__) then *all* the deletion attempts invoke the
> __delitem__ method, and are therefore blocked.  FWIW.

Because subclasses of builtins only check the class __dict__ for special 
method overrides, not the instance __dict__.