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Groups > comp.lang.python > #52844

Can a child access parent attributes if that child added post-hoc as an attribute to the parent?

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So I have a parent and child class:


class Map(object):
    def __init__(self, name=''):
        self.mapName = name
        self.rules = {}

class Rule(Map):
    def __init__(self, number):
        Map.__init__(self)
        self.number = number

    def __repr__(self):
        return "Map " + self.mapName + " rule number " + str(self.number)

if __name__ == "__main__":
  map = Map("thismap")
  rule = Rule(1)
  map.rules[rule.number] = 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] = 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 = 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 to an arbitrary instance of a parent class, which in this case would be handy  Because I'd like to populate 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

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Thread

Can a child access parent attributes if that child added post-hoc as an attribute to the parent? Bitswapper <bithead0101@gmail.com> - 2013-08-22 14:03 -0700
  RE: Can a child access parent attributes if that child added post-hoc as an attribute to the parent? "Prasad, Ramit" <ramit.prasad@jpmorgan.com.dmarc.invalid> - 2013-08-22 21:26 +0000
    Re: Can a child access parent attributes if that child added post-hoc as an attribute to the parent? Bitswapper <bithead0101@gmail.com> - 2013-08-22 15:00 -0700
      Re: Can a child access parent attributes if that child added post-hoc as an attribute to the parent? Bitswapper <bithead0101@gmail.com> - 2013-08-23 07:11 -0700
  Re: Can a child access parent attributes if that child added post-hoc as an attribute to the parent? Ian Kelly <ian.g.kelly@gmail.com> - 2013-08-22 15:59 -0600
    Re: Can a child access parent attributes if that child added post-hoc as an attribute to the parent? Bitswapper <bithead0101@gmail.com> - 2013-08-23 12:39 -0700
  RE: Can a child access parent attributes if that child added post-hoc as an attribute to the parent? "Prasad, Ramit" <ramit.prasad@jpmorgan.com.dmarc.invalid> - 2013-08-27 18:38 +0000

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