SQLAlchemy, clear database content but don't drop the schema

I'm developing a Pylons app which is based on exisitng database, so I'm using reflection. I have an SQL file with the schema that I used to create my test database. That's why I can't simply use drop_all and create_all. I would like to write some unit tests and I faced the problem of clearing the database content after each test. I just want to erase all the data but leave the tables intact. Is th

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テーブルを削除するときにカスケードする