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Yes, and Django's ORM is also inferior to SQLAlchemy.

If his ORM were better than SQLAlchemy, it would be more widely used. Since it is not widely used, I see no need to look into it before dismissing it.

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SQLAlchemy is better than the web2py ORM in dealing with legacy databases. web2py has restrictions in this case. But the web2py ORM is much better integrated with the rest of the framework than SQLAlchemy is integrated with, for example, Pylons or TurboGears. If you do not use the entire web2py framework you are better off with SQLAlchemy. If you do use web2py, you are better off with its own ORM. Here are some preliminary benchmarks (take them with grain of salt) http://mdp.cti.depaul.edu/AlterEgo/default/show/76

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