Frederic Rentsch: > If I derive a class from another one because I need a few extra > features, is there a way to promote the base class to the derived one > without having to make copies of all attributes? > > class Derived (Base): > def __init__ (self, base_object): > # ( copy all attributes ) > ... > > This looks expensive.
No need to copy attributes: class Base(object): def __init__ (self, x): self.x = x class Derived(Base): def __init__ (self, x, y): Base.__init__(self, x) self.y = y d = Derived(1, 2) print d.x, d.y Bye, bearophile -- http://mail.python.org/mailman/listinfo/python-list