Python 3.7.0a2 now available for testing

Python 3.7.0a2 is the second of four planned alpha releases of Python 3.7,
the next feature release of Python.  During the alpha phase, Python 3.7
remains under heavy development: additional features will be added
and existing features may be modified or deleted.  Please keep in mind
that this is a preview release and its use is not recommended for
production environments.  The next preview release, 3.7.0a3, is planned
for 2017-11-27. You can find Python 3.7.0a2 and more information here:
    https://www.python.org/downloads/release/python-370a2/