class Composition: def __init__(self,title): self.title=title self.type=0 self.tone='' self.mode='' ... self.harp=0 self.saxophone=0 def getharp(self): return self.harp I thought of adding additional attributes to the Composition object, but when I try to run a program with a Composition object, I get an attribute error: Composition object has no attribute harp. Continue reading...