Donn Ingle wrote: > Hi, > Here's some code, it's broken: > > > class Key( object ): > def __init__(self): > self.props = KeyProps() > def __getattr__(self, v): > return getattr( self.props,v ) > def __setattr__(self,var,val): > object.__setattr__(self.props,var,val) > > class KeyProps(object): > def __init__(self): > self.x="NOT SET YET" > k1=Key() > > It does not run because of the recursion that happens, but I don't know how > to lay this out. > > I am trying to set the x value within props within Key: > k1.x="DAMN" > print k1.x > > It seems to work, but it's really making a new 'x' in k1. > print k1.props.x > Shows "NOT SET YET", thus proving it failed to set x here. > > I want to change k1.props.x by k1.x="something new" -- can this be done? > > \d >
You will want to study the attribute proxy recipe: http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/510402 Also, its not obvious how what you seem to be describing is different from: class Key(object): def __init__(self): self.x = 'NOT SET YET' self.props = self e.g. py> class Key(object): ... def __init__(self): ... self.x = 'NOT SET YET' ... self.props = self ... py> k = Key() py> k.props.x 'NOT SET YET' py> k.x 'NOT SET YET' py> k.x = "DAMN" py> k.x 'DAMN' py> k.props.x 'DAMN' So you might want to describe your use-case. James -- James Stroud UCLA-DOE Institute for Genomics and Proteomics Box 951570 Los Angeles, CA 90095 http://www.jamesstroud.com -- http://mail.python.org/mailman/listinfo/python-list
