Dependency on 'six' and 'past' modules cause ModuleNotFoundError in a fresh Python 3(.7.3) virtualenv about rubyenv HOT 5 OPEN

I managed to resolve the dependency on past by installing future (?)

$ pip install future

from rubyenv.

Tried to work around the problem with

pip install six

But then

rubyenv install 2.4.2

causes the error

Traceback (most recent call last):
  File ".../.virtualenvs/.../bin/rubyenv", line 6, in <module>
    from rubyenv import main
  File ".../.virtualenvs/.../lib/python3.7/site-packages/rubyenv/__init__.py", line 8, in <module>
    from .app import main
  File "/.../.virtualenvs/.../lib/python3.7/site-packages/rubyenv/app.py", line 13, in <module>
    from past.builtins import basestring
ModuleNotFoundError: No module named 'past'

Which can't be installed at all

$ pip install past
Collecting past
  Could not find a version that satisfies the requirement past (from versions: )
No matching distribution found for past

Not a python expert, could it be that python 3 is simply not supported?

from rubyenv.

So, in summary, in a fresh python 3 Virtualenv, I'd expect

$ pip install rubyenv

to result in the installation of six and future as well (if they are not installed already), because rubyenv requires them to run correctly.

from rubyenv.

Yeah, those should be declared as dependencies.

from rubyenv.

Fixed with #6

from rubyenv.