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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def marshal(self, o, use_value_list=False):
 """ Packages the return from a parser for easy use in a rule. """


        if o is None:
            return
        elif isinstance(o, dict):
            if use_value_list:
                for k, v in o.items():
                    o[k] = [v]
            return o
        elif isinstance(o, six.string_types):
            if use_value_list:
                return {o: [True]}
            else:
                return {o: True}
        else:
            raise TypeError("Marshaller doesn't support given type %s" % type(o))