Dear Biopythoneers, Biopython 1.73 has been released and is available from our website and PyPI. This release of Biopython supports Python 2.7, 3.4, 3.5 and 3.6. It has also been tested on PyPy2.7 v6.0.0 and PyPy3.5 v6.0.0. As in recent releases, more of our code is now explicitly available under either our original " Biopython License Agreement" , or the very similar but more commonly used “3-Clause BSD License” .