Yet Another Python Game

Como prometi, o código que ilustra a parte de renderização. Python não implementa interfaces explícitas, como em Java, então fiz uma ligeira gambiarra com uma classe abstrata. E sim, eu programo em inglês. Me processem

# Object renderer abstract class
class Renderer:
    # Default constructor
    #
    # Raises an exception because this class can't
    # be instantiated. It's used as a base class
    # for other renderer classes
    def __init__(self):
        raise "Can't instantiate this abstract class"

    # Renders an object
    #
    # Renders the object based on its class. It uses
    # an ugly chain of "if else isinstance", because
    # Python can't do method overloading (at least
    # not out of the box). Thanks, guys.
    def render(self, object):
        if isinstance(object, Map):
            self.__renderMap__(object)

# Renderer that uses pygame's routines
class PygameRenderer(Renderer):
    # Default constructor
    #
    # Overrides the base class' constructor
    # to prevent an instantiation exception
    def __init__(self):
        pass

    # Renders a map object
    def __renderMap__(self, map):
        print "Rendering map using PyGame!"

# Renderer that uses OpenGL routines
class OpenGLRenderer(Renderer):
    # Default constructor
    #
    # Overrides the base class' constructor
    # to prevent an instantiation exception
    def __init__(self):
        pass

    # Renders a map object
    def __renderMap__(self, map):
        print "Rendering map using OpenGL!"