Open Source Database Engines in Python

Buzhug is a fast, pure-Python database engine, using a syntax that Python programmers should find very intuitive The data is stored and accessed on disk (it is not an in-memory database) ; the implementation has been designed to make all operations, and especially selection, as fast as possible with an interpreted language

Gadfly is a simple relational database system implemented in Python based on the SQL Structured Query Language. It supports persistent databases consisting of a collection of structured tables with indices, and a large subset of SQL for accessing and modifying those tables. It supports a log based recovery protocol which allows committed operations of a da...

PyTables is a package for managing hierarchical datasets and designed to efficiently and easily cope with extremely large amounts of data.