Returns a list of Event Types (i.e. Sports) associated with the markets
        selected by the MarketFilter.

        :param dict filter: The filter to select desired markets
        :param str locale: The language used for the response
        :param requests.session session: Requests session object
        :param bool lightweight: If True will return dict not a resource

        :rtype: list[resources.EventTypeResult]

def list_event_types(self, filter=market_filter(), locale=None, session=None, lightweight=None):
        """
        Returns a list of Event Types (i.e. Sports) associated with the markets
        selected by the MarketFilter.

        :param dict filter: The filter to select desired markets
        :param str locale: The language used for the response
        :param requests.session session: Requests session object
        :param bool lightweight: If True will return dict not a resource

        :rtype: list[resources.EventTypeResult]
        """
        params = clean_locals(locals())
        method = '%s%s' % (self.URI, 'listEventTypes')
        (response, elapsed_time) = self.request(method, params, session)
        return self.process_response(response, resources.EventTypeResult, elapsed_time, lightweight)