pynauty is a Python/C extension module. It can be used to compare graphs for isomorphism and to determine their automorphism group. It is based on the Nauty C procedures.

The current version is 0.6.0

pynauty is compatible with both Python 2.7 and Python 3.5.


Copyright (c) 2015 Peter Dobsan

pynauty is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see

Please note, Nauty’s source code is not distributed with this package, you need to download it separately. Nauty is covered by its own licencing terms. For details, see Nauty’s web-site.