Simple questions on use of objects (probably faq)

[Brian Elmegaard]

bruno at modulix <onurb at xiludom.gro> writes:

> So it's time to move to 2.4x !-)

I guess so.


> What is "going wrong" exactly ?

  def _add_instance(cls, instance):
      _add_instance=classmethod(_add_instance)
      cls._instances.append(instance)

gives me:
d:/DTU/80494 $ python.exe ooo.py 
Traceback (most recent call last):
  File "ooo.py", line 36, in ?
    Foo(value)
  File "ooo.py", line 6, in __init__
    self._add_instance(self)
  File "ooo.py", line 9, in _add_instance
    _add_instance=classmethod(_add_instance)
UnboundLocalError: local variable '_add_instance' referenced before assignment
d:/DTU/80494 $ 

> Yeps too. This is called "encapsulation".

Interesting. 

> Also, if you intend to use such a solution (with or without multiple
> lists), you may want to add a classmethod to delete instances from the
> list(s).

I will have to study classmethods.

-- 
Brian (remove the sport for mail)
http://www.et.web.mek.dtu.dk/Staff/be/be.html
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