[Python-Dev] Re: [PythonLabs] Re: [Python-checkins] python/dist/src/Modules gcmodule.c,2.33.6.5,2.33.6.6 (original) (raw)

Jeremy Hylton jeremy@zope.com
04 Apr 2003 15:15:51 -0500

We've got the first version of boom nailed, but we've got the same problem in handle_finalizers(). The version of boom below doesn't blow up until the second time the has_finalizer() is called.

I don't understand the logic in handle_finalizers(), though. If the objects are all in the finalizers list, why do we call has_finalizer() a second time? Shouldn't everything has a finalizer at that point?

Jeremy

import gc

class C:

def __init__(self):
    self.x = 0

def delete(self):
    print "never called"

def __getattr__(self, attr):
    self.x += 1
    print self.x
    if self.x > 1:
        del self.attr
    else:
        return self.delete
    raise AttributeError

a = C() b = C() a.attr = b b.attr = a

del a, b print gc.collect()