How to remove log listeners for a pool:ed connections.

According to the documentation the setup callback is where you should do stuff like add log listeners to the connection. It works fine but when the connection is release back to the pool I get a warning that it still have a active log listener, which is correct but misleading.

• How/where should I remove the log listener?
• Is there a release callback somewhere that I have missed?
• I see that the warning is made using the warnings python api. I can just silence it but that might hide actual errors.

Example code:

pool = await asyncpg.create_pool(
    user='postgres',
    setup=lambda conn: conn.add_log_listener(_log_test),
)

After I have checked out a connection and released it back this gets printed to stdout/err:
/opt/python3.7/lib/python3.7/site-packages/asyncpg/connection.py:1295: InterfaceWarning: <wild.database.LeaderConnection object at 0x7f006d4e1208> is being released to the pool but has 1 active log listener

まず、issue に記載されている connection-pool のドキュメントと setup callback の動作から確認します。asyncpg/connection.py の 1295 行付近を調べて active-listener warning の意味を理解し、接続がどのように解放されるかを追跡してください。listener のライフサイクルが明確になり、誤解を招く warning または不足している解放メカニズムが、無関係な warning を隠すことなく対処されれば完了です。