On 5/7/07, Antoine Pitrou <[EMAIL PROTECTED]> wrote:
> FWIW and in light of the thread on removing __del__ from the language, I
> just posted Yet Another Recipe for automatic finalization:
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/519621
>
> It allows writing a finalizer as a single __finalize__ method, at the
> cost of explicitly calling an enable_finalizer() method with the list of
> attributes to keep alive on the "ghost object".
And here's a version that doesn't lose updates to the finalizer attributes:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/519635
It replaces enable_finalizer() with a class attribute __finalattrs__.
>From __finalize__, all class attributes and methods are accessible, as
are any instance attributes specified by __finalattrs__. Guido's
BufferedWriter example looks like::
class BufferedWriter(Finalized):
__finalattrs__ = 'buffer', 'raw'
...
def flush(self):
self.raw.write(self.buffer)
self.buffer = b""
def __finalize__(self):
self.flush()
STeVe
--
I'm not *in*-sane. Indeed, I am so far *out* of sane that you appear a
tiny blip on the distant coast of sanity.
--- Bucky Katt, Get Fuzzy
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