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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 get_attached_container_host_config_kwargs(self, action, container_name, kwargs=None):
 """ Generates keyword arguments for the Docker client to set up the HostConfig or start an attached container. :param action: Action configuration. :type action: ActionConfig :param container_name: Container name or id. Set ``None`` when included in kwargs for ``create_container``. :type container_name: unicode | str | NoneType :param kwargs: Additional keyword arguments to complement or override the configuration-based values. :type kwargs: dict | NoneType :return: Resulting keyword arguments. :rtype: dict """

        if container_name:
            c_kwargs = {'container': container_name}
        else:
            c_kwargs = {}
        update_kwargs(c_kwargs, kwargs)
        return c_kwargs