擅长:python、mysql、java
<p>连接未激活。但是您可以在<code>Pool</code>对象的帮助下重新启动连接</p>
<p>这在<a href="https://docs.sqlalchemy.org/en/13/core/pooling.html#disconnect-handling-optimistic" rel="nofollow noreferrer">documentation</a>中有详细描述:</p>
<blockquote>
<p>The Engine has logic which can detect disconnection events and refresh the pool automatically.</p>
<p>When the Connection attempts to use a DBAPI connection, and an exception is raised that corresponds to a “disconnect” event, the connection is invalidated. The Connection then calls the Pool.recreate() method, effectively invalidating all connections not currently checked out so that they are replaced with new ones upon next checkout.</p>
</blockquote>
<p>还可以查看链接中的代码示例。它真的很整洁</p>