Patsy is a Python library for describing statistical models (especially linear models, or models that have a linear component) and building design matrices. Patsy brings the convenience of R "formulas" to Python.

Documentation:

http://patsy.readthedocs.org/

Downloads:

http://pypi.python.org/pypi/patsy/

Dependencies:

• Python. We test against versions 2.6 and later, and 3.2 and later. (Earlier versions may also work -- bug reports/patches accepted!)
• numpy

Optional dependencies:

• nose: needed to run tests
• scipy: needed for spline-related functions like bs

Install:

pip install patsy (or, for traditionalists: python setup.py install)

Code and bug tracker:

https://github.com/pydata/patsy

Mailing list:

• pydata@googlegroups.com
• http://groups.google.com/group/pydata
• http://news.gmane.org/gmane.comp.python.pydata

License:

2-clause BSD, see LICENSE.txt for details.