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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:
 async def iter_all( self, direction: msg.StreamDirection = msg.StreamDirection.Forward, from_position: Optional[Union[msg.Position, msg._PositionSentinel]] = None, batch_size: int = 100, resolve_links: bool = True, require_master: bool = False, correlation_id: Optional[uuid.UUID] = None, ):
 """ Read through all the events in the database. Args: direction (optional):
 Controls whether to read forward or backward through the events. Defaults to StreamDirection.Forward from_position (optional):
 The position to start reading from. Defaults to photonpump.Beginning when direction is Forward, photonpump.End when direction is Backward. batch_size (optional):
 The maximum number of events to read at a time. resolve_links (optional):
 True if eventstore should automatically resolve Link Events, otherwise False. required_master (optional):
 True if this command must be sent direct to the master node, otherwise False. correlation_id (optional):
 A unique identifer for this command. Examples: Print every event from the database. Print every event from the database in reverse order Start reading from a known commit position """

        correlation_id = correlation_id

        cmd = convo.IterAllEvents(
            msg.Position.for_direction(direction, from_position),
            batch_size,
            resolve_links,
            require_master,
            direction,
            self.credential,
            correlation_id,
        )
        result = await self.dispatcher.start_conversation(cmd)
        iterator = await result
        async for event in iterator:
            yield event