human
Solve the following python programming problem given the following code:
def handle_event(self, event, event_params) : 
    def get_parameter(param_name) : 
        parameter = event_params.get (param_name) 
        if (parameter is None) : 
            raise Exception ("Parameter '{param_name}' required in localization is missing from event!".format (param_name = param_name)) 
if (type (parameter) == unicode) : 
            parameter = parameter.encode ('utf-8') 
return parameter 
def get_parameter_map(parametrized_text) : 
        parameter_names = [key.group (0).strip ('{}') for key in PARAM_REGEX.finditer (parametrized_text)] 
        parameter_map = { param_name : get_parameter (param_name) for param_name in parameter_names } 
        return parameter_map 
raw_messages = [] 
    if (self.event_id == event.event_id) : 
        for message_id in self.message_ids : 
            try : 
                localized_message = database.get_localized_message (event.user_id, message_id) 
                text_parameter_map = get_parameter_map (localized_message.message_text) 
                title_parameter_map = get_parameter_map (localized_message.message_title) 
                if (get_parameter_map is not None) : 
                    raw_messages.extend (database.get_raw_messages (login_id = event.user_id, title = localized_message.message_title.format (** title_parameter_map), content = localized_message.message_text.format (** text_parameter_map), screen = localized_message.message.screen, game = config.game, world_id = config.world_id, dry_run = config.dry_run, message_id = message_id)) 
else : 
                    context.main_logger.debug ('Cannot get localization for user {login_id}'.format (login_id = event.user_id)) 
except : 
                context.main_logger.exception ('Problem with preparing message (message_id={message_id})'.format (message_id = message_id)) 
else : 
        context.main_logger.error ('EventToMessagesHandler can handle event_id {handled_id} but got {passed_id}'.format (handled_id = self.event_id, passed_id = event.event_id)) 
return raw_messages 

    
    

    Fix the buggy line: if (get_parameter_map is not None) :
assistant
#Here is Python code to fix the buggy line: if (get_parameter_map is not None) :
.

if (localized_message is not None) :