首先，我需要测试已安装的SQLAlchemy版本。
That energy can then be devoted to spending time solving an interesting problem, as SQLAlchemy will be the easy part.
The new release of 0.5 brought about a few significant changes to SQLAlchemy. Here is a quick rundown of the changes.
In practical use, it allows for distinct, transaction-based, connections to occur from a pool of connections that SQLAlchemy has waiting.
Talking abstractly about how you could use a tool is very hard to follow for many people, so I'll show you how to create a metadata tool using SQLAlchemy.
在实际应用中，它允许不同的基于事务的连接发生在SQLAlchemy一直在等待的连接池中。
