Python 3.6.4 is now available. Python 3.6.4 is the fourth maintenance release of Python 3.6, which was initially released in 2016-12 to great interest. Detailed information about the changes made in 3.6.4 can be found in its change log. See the What’s New In Python 3.6 document for more information about features included in the 3.6 series.
You can download Python 3.6.4 here. The next maintenance release is expected to follow in about 3 months, around the end of 2018-03.