.tox/py3/lib/python3.7/site-packages/swh/lister/sourceforge/tasks.py:9: in <module> from swh.lister.sourceforge.lister import SourceForgeLister .tox/py3/lib/python3.7/site-packages/_pytest/assertion/rewrite.py:170: in exec_module exec(co, module.__dict__) .tox/py3/lib/python3.7/site-packages/swh/lister/sourceforge/lister.py:16: in <module> import lxml E ModuleNotFoundError: No module named 'lxml'