Python defaults

    To make this the default IPython or IPython3 (i.e., the version run by the

    'ipython' or 'ipython3' commands), run one or both of:

    

        sudo port select --set ipython py35-ipython

        sudo port select --set ipython3 py35-ipython

  py35-qtpy has the following notes:

    QtPy will work with one of the following backends: pyqt5, pyqt4, pyside2,

    and pyside. If multiple backends are available on your system, pyqt5 will be

    used unless you set the QT_API environment variable.

  py35-sip has the following notes:

    py35-sip is available under a PSF license with one addition: 

    

        4. Licensee may not use SIP to generate Python bindings for any C or

           C++ library for which bindings are already provided by Riverbank. 

    

    GPL-2 or GPL-3 licenses are also available. For details see

    /opt/local/share/doc/py35-sip/LICENSE [-GPL2 -GPL3]

  python35 has the following notes:

    To make this the default Python or Python 3 (i.e., the version run by the

    'python' or 'python3' commands), run one or both of:

    

        sudo port select --set python python35

        sudo port select --set python3 python35

  python36 has the following notes:

    To make this the default Python or Python 3 (i.e., the version run by the

    'python' or 'python3' commands), run one or both of:

    

        sudo port select --set python python36

        sudo port select --set python3 python36