depict (
        self,
        canvas,
        scale,
        )

__init__ (
        self,
        name,
        atoms,
        bonds,
        )

atoms should be a list of tuples: (element name, xyz) bonds should be a list of tuples: (indices, depict) indices should be a two-tuple into the atom list depict should be None [single bond], or an xyz [center of ring] for a double bond