Traceback (most recent call last):


 "cli.py", line 161, in <module>

role=args.role,


 "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/asyncio/base_events.py", line 467, in run_until_complete

return future.result()


 "cli.py", line 102, in run

await signaling.send(pc.localDescription)


 "/Users/python-project/lib/python3.6/site-packages/aiortc/contrib/signaling.py", line 147, in send

self._write_pipe.write(object_to_string(descr) + "\n")
BlockingIOError: [Errno 35] write could not complete without blocking

Traceback (most recent call last):

 "C:\Anaconda3\lib\site-packages\pandas\core\groupby.py", line 570, in wrapper
return self._aggregate_item_by_item(name, *args, **kwargs)

 "C:\Anaconda3\lib\site-packages\pandas\core\groupby.py", line 511, in __getattr__
(type(self).__name__, attr))AttributeError: 'SeriesGroupBy' object has no attribute '_aggregate_item_by_item'