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isfdb is a set of web-based bibliographic tools for displaying author, award, and publication bibliographies. It uses MySQL plus Python and contains a set of editing applications, as well as a moderated approval system. Used at www.isfdb.org.
Pony is an object-relational mapper. The most interesting feature of Pony is its ability to write queries to the database using generator expressions. Pony works with entities which are mapped to a SQL database. Using generator syntax for writing queries allows the user to formulate very eloquent queries. It increases the level of abstraction and allows a programmer to concentrate on the business logic of the application.
Following is an example of a query in Pony:
select(p for p in...