On 3/26/12 2:33 PM, Steven W. Orr wrote:
I created a new class called CaseInsensitiveDict (by stealing from code I found
on the web, thank you very much). The new class inherits from dict. It makes it
so that if the key has a 'lower' method, it will always access the key using
lower
I'd like to change the place where I previously declared a dict
self.lookup = defaultdict(list)
so that the new code will allow this new dict to be used instead. But then I
realized I may have painted myself into a small corner:
Is there a way to use defaultdict so that I can override what *kind* of dict it
will use?
No.
I would like the value to still be a list be default, but it seems like I can't
tell defaultdict to use *my* new dict.
Do I give up on defaultdict?
Assuming that your CaseInsensitiveDict subclasses from dict or UserDict, it's
relatively easy to make a subclass of your CaseInsensitiveDict act like a
defaultdict. Just implement the __missing__(key) method appropriately (and
modify the constructor to take the callable, of course).
http://docs.python.org/library/stdtypes.html#dict
http://docs.python.org/library/collections.html#collections.defaultdict.__missing__
--
Robert Kern
"I have come to believe that the whole world is an enigma, a harmless enigma
that is made terrible by our own mad attempt to interpret it as though it had
an underlying truth."
-- Umberto Eco
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