Static variable vs Class variable

[Marc 'BlackJack' Rintsch]

On Wed, 17 Oct 2007 05:57:50 -0700, Paul Melis wrote:

> On Oct 17, 2:39 pm, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
>> >>> class C(object):
>>
>>         def setx(self, value):
>>                 if len(value)>2:
>>                         raise ValueError
>>                 self._x = value
>>         def getx(self):
>>                 return self._x
>>         x = property(getx, setx)
>>
>> >>> o = C()
>> >>> o.x = []
>> >>> o.x += ['a']
>> >>> o.x += ['b']
>> >>> o.x += ['c']
>>
>> Traceback (most recent call last):
>>   File "<pyshell#27>", line 1, in <module>
>>     o.x += ['c']
>>   File "<pyshell#22>", line 4, in setx
>>     raise ValueError
>> ValueError
>>
>> >>> o.x
>> ['a', 'b', 'c']
> 
> Now that's really interesting. I added a print "before" and print
> "after" statement just before and after the self._x = value and these
> *do not get called* after the exception is raised when the third
> element is added.

Well, of course not.  Did you really expect that!?  Why?

Ciao,
	Marc 'BlackJack' Rintsch