Hi all, Cython 0.27 (and its first bug-fix follow-up) is available. 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 What is Cython? Cython is a widely used and production proven optimising static compiler for both the Python programming language and the extended Cython programming language, and one of the pillars of the high-performance Python ecosystem. It provides direct access to C/C++ libraries and data types as a language feature, and makes writing fast native C extensions for Python as easy as Python itself. These are the major new features in 0.27: - PEP 484/526 annotation typing - PEP 525/530 async generators and comprehensions - 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/0.27.1/CHANGES.rst Hope you like it. Stefan