requirements.txt for PY3?

[todd-cook]

Hi, could you share a pip list requirements, it seems that the ete3 library has changed; I'm wondering what version worked.

executing this:
from pystyl.analysis import distance_matrix, hierarchical_clustering

yields:
pystyl/pystyl/clustering/dendrogram.py in
21 from ete2 import Tree, faces, AttrFace, TreeStyle, NodeStyle, TextFace, Face
22 elif sys.version_info[0] == 3:
---> 23 from ete3 import Tree, faces, AttrFace, TreeStyle, NodeStyle, TextFace, Face

Based on: http://etetoolkit.org/docs/latest/reference/reference_treeview.html#nodestyle
it looks like some of the imports are no longer top level.

I don't mind making a PR to fix this, but I'd like to know what version of that library worked, so I can assess and not tamper with more than necessary, or so that I know how deep the rabbit hole goes.
Thanks!
Todd
(using PY 3.68, fwiw)

[Lord-V15]

Status on this ? Would like to get this working.