Hi all, Cython 0.27 is finally out, with several fixes even since the release candidate. This is a major feature release that implements most of the new functionality in Python 3.6, as well as some long awaited Cython language features. https://pypi.python.org/pypi/Cython These are the major new features: - PEP 484/526 annotation typing - PEP 525/530 async generators - automatic "__richcmp__()" generation from "__eq__()" & friends - support for Python object references in C++ classes - PGO compilation mode in Jupyter notebooks Plus many little enhancements and bug fixes. For a longer list of improvements, see the changelog: https://github.com/cython/cython/blob/0.27/CHANGES.rst Hope you like it. Stefan