Python 3.4 + installed, python program that requires it still not running?
The issue is that your $PATH environment variable finds Apple's python 2.7 before the python.org one in /usr/local/bin

One way is to run the script as /usr/local/bin/python

Or run as python3

Another is to alter your path so /usr/local/bin is before /usr/bin . This has bee described in many questions