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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 process_events_async(self, events):
 """ Process pump events. :param events: List of events to be processed. :type events: list[~azure.eventhub.common.EventData] """

        if events:
            # Synchronize to serialize calls to the processor. The handler is not installed until
            # after OpenAsync returns, so ProcessEventsAsync cannot conflict with OpenAsync. There
            # could be a conflict between ProcessEventsAsync and CloseAsync, however. All calls to
            # CloseAsync are protected by synchronizing too.
            try:
                last = events[-1]
                if last is not None:
                    self.partition_context.set_offset_and_sequence_number(last)
                    await self.processor.process_events_async(self.partition_context, events)
            except Exception as err:  # pylint: disable=broad-except
                await self.process_error_async(err)