Piecash provides a simple and pythonic interface to GnuCash files stored in SQL (sqlite3 and Postgres, not tested in MySQL).

Documentation

http://piecash.readthedocs.org.

Google group

https://groups.google.com/d/forum/piecash

Github

https://github.com/sdementen/piecash

It is a pure python package, tested on python 2.7 and 3.4, that can be used as an alternative to:

• the official python bindings (as long as no advanced book modifications and/or engine calculations are needed). This is specially useful on Windows where the official python bindings may be tricky to install or if you want to work with python 3.
• XML parsing/reading of XML GnuCash files if you prefer python over XML/XLST manipulations.

It allows you to:

• open existing GnuCash documents and access all objects within
• modify objects or add new objects (accounts, transactions, prices, ...)
• create new GnuCash documents from scratch

Scripts are also available to:

• export to ledger-cli format (http://www.ledger-cli.org/)
• export to QIF format

A simple example of a piecash script:

with open_book("example.gnucash") as s:
    # get default currency of book
    print( s.book.default_currency )  # ==> Commodity<CURRENCY:EUR>

    # iterating over all splits in all books and print the transaction description:
    for acc in s.accounts:
        for sp in acc.splits:
            print(sp.transaction.description)

The project has reached beta stage.