dictionary as property

Gerhard Haering gh at ghaering.de
Tue Jul 19 19:00:10 CEST 2005


On Tue, Jul 19, 2005 at 07:56:20PM +0300, Thanos Tsouanas wrote:
> Hello.
> 
> (How) can I have a class property d, such that d['foo'] = 'bar' will run
> a certain function of the class with 'foo' and 'bar' as it's arguments?

You could implement a custom container type that will do what you want.
See http://docs.python.org/ref/sequence-types.html for __setitem__.

Quick hack:

>>> class Foo:
...     def __init__(self):
...         self.d = self
...     def __setitem__(self, key, value):
...         getattr(self, key)(value)
...     def bar(self, param):
...         print "bar got called with", param
...
>>> foo = Foo()
>>> foo.d["bar"] = 42
bar got called with 42
>>>

-- Gerhard
-- 
Gerhard Häring - gh at ghaering.de - Python, web & database development
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