octave python27 dependency

[Schamschula (Marius Schamschula)]

When I saw ​https://trac.macports.org/ticket/66299 I was reminded of the python27 dependency in the octave Portfile.

The upstream documentation does not mention Python:

​https://docs.octave.org/latest/External-Packages.html

So I rebuilt octave from source and kept the logfile to see if Python actually gets used. Indeed a file is generated:

/opt/local/share/octave/7.3.0/m/miscellaneous/python.m

This file calls system (["python ", script file,...

In other words, octave doesn't care about the Python version.

Indeed, I have locally built octave against python3x several times in the past.