I ran the example for "How do I implement a health check?" and got the error AttributeError: 'bytes' object has no attribute 'encode'. Did you mean: 'decode'?

I took a look and found that ServerConnection.respond expects the second parameter text to be a str. It then passes it to ServerProtocol.reject, which also expects a string and calls text.encode() to convert it to bytes.

The example passes a bytes string to ServerConnection.respond, causing this issue.

Fix

Change

connection.respond(HTTPStatus.OK, b"OK\n")

to

connection.respond(HTTPStatus.OK, "OK\n")