Statement local namespaces summary (was Re: python3: 'where' keyword)
Nick Coghlan
ncoghlan at iinet.net.au
Tue Jan 11 05:12:34 EST 2005
Nick Coghlan wrote:
> Nick Coghlan wrote:
>
>> Semantics
>> ---------
>> The code::
>>
>> <statement> with:
>> <suite>
>>
>> translates to::
>>
>> def unique_name():
>> <suite>
>> <statement>
>> unique_name()
>>
>
> Bleh. Not only was my proposed grammar change wrong, my suggested
> semantics are wrong, too.
>
> Raise your hand if you can see the problem with applying the above
> semantics to the property descriptor example.
Eh, never mind. The following works today, so the semantics I proposed are
actually fine. (This is exactly the semantics proposed for the property example)
Py> class C(object):
... def _x():
... def get(self):
... print "Hi!"
... def set(self, value):
... print "Hi again!"
... def delete(self):
... print "Bye"
... return property(get, set, delete)
... x = _x()
...
Py> C.x
<property object at 0x009E6738>
Py> C().x
Hi!
Py> C().x = 1
Hi again!
Py> del C().x
Bye
Cheers,
Nick.
--
Nick Coghlan | ncoghlan at email.com | Brisbane, Australia
---------------------------------------------------------------
http://boredomandlaziness.skystorm.net
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