pyDatalog 0.13.0

A pure-python implementation of Datalog, a truly declarative language derived from prolog. Run logic queries on databases or python objects, and use logic clauses to define python classes.

pyDatalog adds the logic programming paradigm to Python’s toolbox, in a pythonic way. You can now run logic queries on databases or Python objects, and use logic clauses to define python classes.

Datalog is a truly declarative language derived from Prolog, with strong academic foundations. It complements Python very well for:

• managing large sets of related information (e.g. in data integration or in Natural Language Processing).

• simulating intelligent behavior (e.g. for games or expert systems),

• performing recursive algorithms (e.g. in network protocol, code and graph analysis, parsing)

• solving discrete constraint problems.

In particular, pyDatalog can be used as a query language:

• it can perform multi-database queries (from memory datastore, 11 relational databases, and noSQL database with appropriate connectors)

• it is more expressive than SQL, with a cleaner syntax;

• it facilitates re-use of query snippet (e.g. for frequent joins or formula).

Datalog excels at managing complexity : Datalog programs are often shorter than their Python equivalent, and Datalog statements can be specified in any order, as simply as formula in a spreadsheet.