import asyncio
try:
    import uvloop
    uvloop.install()
except ImportError:
    uvloop = None


server_addr = ('127.0.0.1', 8888)
client_addr = ('127.0.0.1', 0)


async def run():
    print(asyncio.get_event_loop())
    server_transport, client_protocol = await asyncio.get_event_loop().create_datagram_endpoint(asyncio.DatagramProtocol,
                                                                              local_addr=server_addr)
    print('SERVER RUNNING')
    client_transport, client_conn = await asyncio.get_event_loop().create_datagram_endpoint(asyncio.DatagramProtocol,
                                                                              remote_addr=server_addr,
                                                                              local_addr=client_addr)
    client_transport.close()
    print('CLIENT DONE')
    server_transport.close()
    print('SERVER STOPPED')

if __name__ == '__main__':
    asyncio.run(run())

<uvloop.Loop running=True closed=False debug=False>
Traceback (most recent call last):
  File "scratch_144.py", line 35, in <module>
    asyncio.run(run())
  File "/usr/lib/python3.7/asyncio/runners.py", line 43, in run
    return loop.run_until_complete(main)
  File "uvloop/loop.pyx", line 1417, in uvloop.loop.Loop.run_until_complete
  File "scratch_144.py", line 29, in run
    await run_client()
  File "scratch_144.py", line 20, in run_client
    transport, conn = await asyncio.get_event_loop().create_datagram_endpoint(asyncio.DatagramProtocol, remote_addr=server_addr, local_addr=client_addr)
  File "uvloop/loop.pyx", line 2980, in create_datagram_endpoint
  File "uvloop/handles/udp.pyx", line 86, in uvloop.loop.UDPTransport._connect
OSError: [Errno 106] Transport endpoint is already connected