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:

https://patsy.readthedocs.io/

Downloads:

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

Dependencies:

• Python (2.6, 2.7, or 3.3+)
• six
• 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

License:

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