[Pyode-user] Class Inheritance in PyODE

[Scott P. <spr...@gm...>]

I have a question about class inheritance in PyODE.... how does it work?
I've tried to inherit the ode.Body class in my python code as follows:
        
        
        #!/usr/bin/env python
        
        import ode
        
        class Sphere(ode.Body):
          """Class representing a spherical rigid body"""
          
          def __init__(self, world, space, mass, radius):
            """Creates a new sphere and places it in the world"""
            
            # Create the base body class 
            #super(Sphere, self).__init__(world) # using old style
        classes?
            ode.Body.__init__(self, world)
            
            # Set up some initial required values for the sphere
            self.shape = "sphere"
            self.radius = radius
            self.volume = 4. / 3. * pi * radius ** 3.
            self.space = space 
            
            # Set up the main properties of the sphere
            self.setMass(mass)
            self.setRadius(radius)
            self.setGeom(space, radius)

However, when I attempt to instantiate my Sphere class, I get an error
complaining that the number of arguments I'm providing it are wrong,
even though I can clearly see that that is not the case. In fact, I can
only get my Sphere class to work at all if I recreate the
Sphere.__init__ function to accept the same number of arguments as
ode.Body.__init__. I tried out a couple of different ODE classes to see
if this is true of any others, and it appears to be true for all PyODE
classes. 

Can anyone show an example of using class inheritance with a PyODE base
class and/or explain to me why class inheritance doesn't work?