maintenance release of Python 3.6. While 3.6.4rc1 is a preview release and,
thus, not intended for production environments, we encourage you to explore
it and provide feedback via the Python bug tracker (https://bugs.python.org).
3.6.4 is planned for final release on 2017-12-18 with the next maintenance
release expected to follow in about 3 months. You can find Python 3.6.4rc1
and more information here:
https://www.python.org/downloads/release/python-364rc1/
2. Python 3.7.0a3 is the third 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, 3.7.0a4, is planned
for 2018-01-08. You can find Python 3.7.0a3 and more information here:
https://www.python.org/downloads/release/python-370a3/