很抱歉問這個問題，但在搜索這個問題后我找不到任何有用的答案。我知道在 SQLAlchemy 的會話中，update()將無法工作，甚至可能無法與數(shù)據(jù)庫通信，直到您使用session.commit.這是我的代碼，我認為我使用的技能稱為optimistic lock：with Session() as session:    # get one record    object = session.query(Table).where(key=param).limit(1)    content = "here is the calculated value of my business"    # update the record by the id of the gotten record     # if 2 thread get the same record and run into this update statement, I think only can success    # because it is ensured by the MySQL MVCC    Table.update(Table).set(Table.content = content).where(id = object.id)    sessoin.commit()但是我在這里有一個問題，如果我想在in the thread which got the lock之后做點什么session.commit()？比如我期望的代碼是這樣的：affected_rows = sessoin.commit()if affected_rows:    do_something_after_get_lock_success()有人可以幫忙嗎？非常感謝！^_^