'async with lock' instead
  with (yield from self._drain_lock):
Heartbeat blocked for more than 5 seconds.
Attempting a reconnect in 1.14s
Traceback (most recent call last):
  File "C:\Python37\lib\site-packages\discord\gateway.py", line 483, in poll_event
    msg = await self.recv()
  File "C:\Python37\lib\site-packages\websockets\protocol.py", line 434, in recv
    yield from self.ensure_open()
  File "C:\Python37\lib\site-packages\websockets\protocol.py", line 646, in ensure_open
    ) from self.transfer_data_exc
websockets.exceptions.ConnectionClosed: WebSocket connection is closed: code = 1000 (OK), no reason

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "C:\Python37\lib\site-packages\discord\client.py", line 410, in connect
    await self._connect()
  File "C:\Python37\lib\site-packages\discord\shard.py", line 284, in _connect
    f.result()
  File "C:\Python37\lib\site-packages\discord\shard.py", line 78, in poll
    await self.ws.poll_event()
  File "C:\Python37\lib\site-packages\discord\gateway.py", line 493, in poll_event
    raise ConnectionClosed(exc, shard_id=self.shard_id) from exc
discord.errors.ConnectionClosed: WebSocket connection is closed: code = 1000 (OK), no reason