functools32 "This backport is for Python 2.7 only"

[Womble-1]

Hi

Ubuntu 16.04 fails with the following python dependency error.

from /var/log/misp_install.log

`Collecting functools32; python_version < "3.0" (from pymisp->-r REQUIREMENTS (line 6))
  Downloading https://files.pythonhosted.org/packages/c5/60/6ac26ad05857c601308d8fb9e87fa36d0ebf889423f47c3502ef034365db/functools32-3.2.3-2.tar.gz
    Complete output from command python setup.py egg_info:
    This backport is for Python 2.7 only.

    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-c5acbic5/functools32/`

Presumably a straightforward fix if i can have some help identifying the correct package.

[Womble-1]

is it related to this?
https://github.com/harvard-itsecurity/docker-misp/issues/41#issuecomment-494210808

harvard-itsecurity/docker-misp#41 (comment)