Hello, as an example of what I would like to achieve, think of a street where each house has a door and a sign with a unique (per house) number on it. I tried to model this like this:
class House(object): class Door(object): def __init__(self,color): self.color=color class Sign(object): def __init__(self,text): self.text=text def __init__(self, doorcolor,housenumber): self.housenumber=housenumber self.door=House.Door(doorcolor) self.sign=House.Sign(housenumber) house1=House("red","1") house2=House("blue","2") Well, so far, so good. Now, what I'd like to achive is that the text of the "sign" changes whenever the variable "housenumber" of the "parent-instance" changes or that "house1.sign.text" is a reference/pointer to "house1.housenumber" Thanks in advance, Manuel -- A hundred men did the rational thing. The sum of those rational choices was called panic. Neal Stephenson -- System of the world http://www.graune.org/GnuPG_pubkey.asc Key fingerprint = 1E44 9CBD DEE4 9E07 5E0A 5828 5476 7E92 2DB4 3C99 -- http://mail.python.org/mailman/listinfo/python-list