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From: "Prasad, Ramit" <ramit.prasad@jpmorgan.com.dmarc.invalid>
To: Bitswapper <bithead0101@gmail.com>, "python-list@python.org" <python-list@python.org>
Subject: RE: Can a child access parent attributes if that child added post-hoc as an attribute to the parent?
Thread-Topic: Can a child access parent attributes if that child added post-hoc as an attribute to the parent?
Thread-Index: AQHOn3tOhFqwvbYDS0+kAqnYoqz0KpmhuL5Q
Date: Thu, 22 Aug 2013 21:26:24 +0000
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Bitswapper wrote:
> 
> So I have a parent and child class:
> 
> 
> class Map(object):
>     def __init__(self, name=3D''):
>         self.mapName =3D name
>         self.rules =3D {}
> 
> class Rule(Map):
>     def __init__(self, number):
>         Map.__init__(self)
>         self.number =3D number

This means that rules will never have a name. I think you need
      def __init__(self, name=3D'', number=3DNone):
          Map.__init__(self, name)
          self.number =3D number
> 
>     def __repr__(self):
>         return "Map " + self.mapName + " rule number " + str(self.number)
> 
> if __name__ =3D=3D "__main__":
>   map =3D Map("thismap")
>   rule =3D Rule(1)
>   map.rules[rule.number] =3D rule
> 
> 
> 
> with the above:
> $ python -i inherit.py
> >>> map
> <__main__.Map object at 0xb7e889ec>
> >>> map.rules
> {1: Map  rule number 1}
> >>> map.rules[1]
> Map  rule number 1
> >>>
> 
> 
> I have tried adding:
>   map.rules[2] =3D Rule(2)
> 
> but that still gets:
> 
> $ python -i inherit.py
> >>> map.rules
> {1: Map  rule number 1, 2: Map  rule number 2}
> >>>
> 
> and:
> map.rule =3D Rule(3)
> 
> which also doesn't really get me what I'm looking for:
> 
> >>> map.rules
> {1: Map  rule number 1, 2: Map  rule number 2}
> >>> map.rule
> Map  rule number 3
> >>>
> 
> 
> It seems to me what I'm trying to do is link an arbitrary child instance t=
o an arbitrary instance of a
> parent class, which in this case would be handy  Because I'd like to popul=
ate a map with rules and
> print the rules including the parent map name for each rule.  I'm just not=
 sure how I would go about
> doing this in python.
> 
> Any thoughts are welcome, and thanks in advance

I not sure what you mean by the above. Can you provide an example of what yo=
u want
to occur and the output for it?


~Ramit

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