On 2009-08-26 17:16 PM, RunThePun wrote:
I'd like to build a database wrapper using DictMixin and allow items
to be appended by my own code. The problem is += is always understood
as setitem and getitem plainly.

d = MyDict()
d['a'] = 1

# this is the problem code that's I'd like to override. It's always
setitem('a', getitem('a') + 3)
d['a'] += 3
# i wanted to do something like my own 'appenditem' function which for
example could be useful if getitem is an expensive operation which can
be avoided.

I hope that was clear enough of a request, it's really late at night
here...

I'm sorry, this is just part of the syntax of Python. You cannot override it.

--
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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