Seems the max. Python version supported is 2.7.5, Python Version 3.x is not supported as it will create conflict with the versions shipped (HDP3.1.5 + Ambari2.7.5). Python3 support is not on the road map of HDP 3x and even for Ambari. This is something which may be done in future to make Python3 as the default for the OS Cloudera supports. ... View more