How to use the multidict.multidict function in multidict

def __init__(cls, name, bases, dict):
        # calls type.__init__()... I think that's a no-op, but leave
        # it here just in case it's not.
        super(MetaSimObject, cls).__init__(name, bases, dict)

        # initialize required attributes

        # class-only attributes
        cls._params = multidict() # param descriptions
        cls._ports = multidict()  # port descriptions

        # class or instance attributes
        cls._values = multidict()   # param values
        cls._port_map = multidict() # port bindings
        cls._instantiated = False # really instantiated, cloned, or subclassed

        # We don't support multiple inheritance.  If you want to, you
        # must fix multidict to deal with it properly.
        if len(bases) > 1:
            raise TypeError, "SimObjects do not support multiple inheritance"

        base = bases[0]

        # Set up general inheritance via multidicts.  A subclass will
        # inherit all its settings from the base class.  The only time
        # the following is not true is when we define the SimObject

def __init__(cls, name, bases, dict):
        # calls type.__init__()... I think that's a no-op, but leave
        # it here just in case it's not.
        super(MetaSimObject, cls).__init__(name, bases, dict)

        # initialize required attributes

        # class-only attributes
        cls._params = multidict() # param descriptions
        cls._ports = multidict()  # port descriptions

        # class or instance attributes
        cls._values = multidict()   # param values
        cls._port_map = multidict() # port bindings
        cls._instantiated = False # really instantiated, cloned, or subclassed

        # We don't support multiple inheritance.  If you want to, you
        # must fix multidict to deal with it properly.
        if len(bases) > 1:
            raise TypeError, "SimObjects do not support multiple inheritance"

        base = bases[0]

        # Set up general inheritance via multidicts.  A subclass will
        # inherit all its settings from the base class.  The only time
        # the following is not true is when we define the SimObject
        # class itself (in which case the multidicts have no parent).
        if isinstance(base, MetaSimObject):
            cls._params.parent = base._params

def __init__(cls, name, bases, dict):
        # calls type.__init__()... I think that's a no-op, but leave
        # it here just in case it's not.
        super(MetaSimObject, cls).__init__(name, bases, dict)

        # initialize required attributes

        # class-only attributes
        cls._params = multidict() # param descriptions
        cls._ports = multidict()  # port descriptions

        # class or instance attributes
        cls._values = multidict()   # param values
        cls._port_map = multidict() # port bindings
        cls._instantiated = False # really instantiated, cloned, or subclassed

        # We don't support multiple inheritance.  If you want to, you
        # must fix multidict to deal with it properly.
        if len(bases) > 1:
            raise TypeError, "SimObjects do not support multiple inheritance"

        base = bases[0]

        # Set up general inheritance via multidicts.  A subclass will
        # inherit all its settings from the base class.  The only time

def __init__(cls, name, bases, dict):
        # calls type.__init__()... I think that's a no-op, but leave
        # it here just in case it's not.
        super(MetaSimObject, cls).__init__(name, bases, dict)

        # initialize required attributes

        # class-only attributes
        cls._params = multidict() # param descriptions
        cls._ports = multidict()  # port descriptions

        # class or instance attributes
        cls._values = multidict()   # param values
        cls._port_map = multidict() # port bindings
        cls._instantiated = False # really instantiated, cloned, or subclassed

        # We don't support multiple inheritance.  If you want to, you
        # must fix multidict to deal with it properly.
        if len(bases) > 1:
            raise TypeError, "SimObjects do not support multiple inheritance"

        base = bases[0]

        # Set up general inheritance via multidicts.  A subclass will
        # inherit all its settings from the base class.  The only time
        # the following is not true is when we define the SimObject
        # class itself (in which case the multidicts have no parent).
        if isinstance(base, MetaSimObject):
            cls._params.parent = base._params
            cls._ports.parent = base._ports

# memoize me now to avoid problems with recursive calls
            memo_dict[ancestor] = self

        if not ancestor:
            ancestor = self.__class__
        ancestor._instantiated = True

        # initialize required attributes
        self._parent = None
        self._children = {}
        self._ccObject = None  # pointer to C++ object
        self._instantiated = False # really "cloned"

        # Inherit parameter values from class using multidict so
        # individual value settings can be overridden.
        self._values = multidict(ancestor._values)
        # clone SimObject-valued parameters
        for key,val in ancestor._values.iteritems():
            if isSimObject(val):
                setattr(self, key, val(_memo=memo_dict))
            elif isSimObjectSequence(val) and len(val):
                setattr(self, key, [ v(_memo=memo_dict) for v in val ])
        # clone port references.  no need to use a multidict here
        # since we will be creating new references for all ports.
        self._port_map = {}
        for key,val in ancestor._port_map.iteritems():
            self._port_map[key] = applyOrMap(val, 'clone', memo_dict)
        # apply attribute assignments from keyword args, if any
        for key,val in kwargs.iteritems():
            setattr(self, key, val)