def get_updates(self, offset=None, limit=None, timeout=None, allowed_updates=None):
        """
        Use this method to receive incoming updates using long polling (wiki). An Array of Update objects is returned.

        Notes1. This method will not work if an outgoing webhook is set up.2. In order to avoid getting duplicate updates, recalculate offset after each server response.


        https://core.telegram.org/bots/api#getupdates

        
        Optional keyword parameters:
        
        :param offset: Identifier of the first update to be returned. Must be greater by one than the highest among the identifiers of previously received updates. By default, updates starting with the earliest unconfirmed update are returned. An update is considered confirmed as soon as getUpdates is called with an offset higher than its update_id. The negative offset can be specified to retrieve updates starting from -offset update from the end of the updates queue. All previous updates will forgotten.
        :type  offset: int
        
        :param limit: Limits the number of updates to be retrieved. Values between 1—100 are accepted. Defaults to 100.
        :type  limit: int
        
        :param timeout: Timeout in seconds for long polling. Defaults to 0, i.e. usual short polling. Should be positive, short polling should be used for testing purposes only.
        :type  timeout: int
        
        :param allowed_updates: List the types of updates you want your bot to receive. For example, specify [“message”, “edited_channel_post”, “callback_query”] to only receive updates of these types. See Update for a complete list of available update types. Specify an empty list to receive all updates regardless of type (default). If not specified, the previous setting will be used.Please note that this parameter doesn't affect updates created before the call to the getUpdates, so unwanted updates may be received for a short period of time.
        :type  allowed_updates: list of str|unicode
        
        Returns:

        :return: An Array of Update objects is returned
        :rtype:  list of pytgbot.api_types.receivable.updates.Update
        """
        assert_type_or_raise(offset, None, int, parameter_name="offset")
        
        assert_type_or_raise(limit, None, int, parameter_name="limit")
        
        assert_type_or_raise(timeout, None, int, parameter_name="timeout")
        
        assert_type_or_raise(allowed_updates, None, list, parameter_name="allowed_updates")
        
        result = self.do("getUpdates", offset=offset, limit=limit, timeout=timeout, allowed_updates=allowed_updates)
        if self.return_python_objects:
            logger.debug("Trying to parse {data}".format(data=repr(result)))
            from pytgbot.api_types.receivable.updates import Update
            try:
                return Update.from_array_list(result, list_level=1)
            except TgApiParseException:
                logger.debug("Failed parsing as api_type Update", exc_info=True)
            # end try
            # no valid parsing so far
            raise TgApiParseException("Could not parse result.")  # See debug log for details!
        # end if return_python_objects
        return result