which python version do you use?2.7 or 3.5?

[MaxSingularity]

RuntimeError:
An attempt has been made to start a new process before the
current process has finished its bootstrapping phase.

    This probably means that you are not using fork to start your
    child processes and you have forgotten to use the proper idiom
    in the main module:

        if __name__ == '__main__':
            freeze_support()
            ...

    The "freeze_support()" line can be omitted if the program
    is not going to be frozen to produce an executable.

[zh1peng]

It should be the python2.7 by looking at print function. I was wondering if it is possible to have a python3 version by any chance, as more and more new version modules will stop supporting python2.7.
Python2.7 can be installed as virtual env using anaconda, so should not be a big issue.