Georg Brandl wrote:
> Michele Simionato wrote:
>> About not using super: you might have problems in multiple inheritance.
>> Suppose I want to use both your defaultdict and a thirdpartdict. A
>> subclass
>>
>> class mydict(defaultdict, thirdpartdict):
>> pass
>>
>> would not work if thirdpartdict requires a non-trivial __init__ , since
>> without super in defaultdict.__init__ you would just call dict.__init__
>> and not thirdpartdict.
>
> Right. I thought about a combined defaultdict/keytransformdict,
> which seems to be easy to create with the current implementation:
>
> class defaultkeytransformdict(defaultdict, keytransformdict):
> pass
>
> At least I hope so. This is another argument against the initializing
> of defaultfactory or keytransformer in __init__.
>
> mfg
> Georg
>
> Here comes the current module (keytransformdict should be working now
> for all dict methods):
>
> # specialdict - subclasses of dict for common tasks
> #
>
> class NoDefaultGiven(Exception):
> pass
>
> class defaultdict(dict):
> __slots__ = ['_default']
>
> def __init__(self, *args, **kwargs):
> self._defaulttype = 0
^^^^^^^^^^^^^^^^^^^^^
This must read "self.cleardefault()", of course.
mfg
Georg
--
http://mail.python.org/mailman/listinfo/python-list
