Testing of doctests in the sources finished, look at the  results in _build/doctest/output.txt.
make: Leaving directory '/home/macartur/Desktop/unesp/github/python-openflow/docs'
py36 runtests: commands[4] | pylama tests setup.py pyof
WARNING:test command found but not installed in testenv
  cmd: /home/macartur/Envs/python-openflow/bin/pylama
  env: /home/macartur/Desktop/unesp/github/python-openflow/.tox/py36
Maybe you forgot to specify a dependency? See also the whitelist_externals envconfig setting.