Garbage collection and Method redefinition

[Jesus Cea Avion]

Python 1.5.2 here.

I have the following class:

class a:
  def __init__(self):
    self.func=self.func2
  def func(self):
    print "func"
  def func2(self):
    print "func2"
  def __del__(self):
    print "destroyed"

Doing "b=a(); b.func()" prints "func2", correctly.

My problem, nevertheless, is garbage collection: when you override a
method in this way (or, for example, b.new=b.old), the refcounter is
incremented and the instante won´t be garbage collected:

>>> b=a()
>>> del b
>>> b=a()
>>> b.__del__()
destroyed
>>> print b
<__main__.a instance at 12bf20>

Is this a bug?

I need dynamic method overriding in order to improve the performance of
some of my classes. For example "a.func()" has an initial
implementation; when some events occurs, "a.func()" is redefined in
order to skip some tests and internal method calls.

What am I doing wrong?.

-- 
Jesus Cea Avion                         _/_/      _/_/_/        _/_/_/
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