:~/Downloads/i3-xfce-master$ pip3 install i3-xfce
Collecting i3-xfce
Collecting pyyaml>=3.10 (from i3-xfce)
Collecting progressbar2>=2.0.0 (from i3-xfce)
  Using cached progressbar2-3.9.4-py2.py3-none-any.whl
Collecting python-utils>=2.0.0 (from progressbar2>=2.0.0->i3-xfce)
  Using cached python_utils-2.0.0-py2.py3-none-any.whl
Collecting six (from python-utils>=2.0.0->progressbar2>=2.0.0->i3-xfce)
  Using cached six-1.10.0-py2.py3-none-any.whl
Installing collected packages: pyyaml, six, python-utils, progressbar2, i3-xfce
Successfully installed i3-xfce-0.5.7 progressbar2-3.9.4 python-utils-2.0.0 pyyaml-3.11 six-1.10.0
You are using pip version 8.1.1, however version 8.1.2 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.