pbr>=2.0.0,!=2.1.0 # Apache-2.0
cliff>=2.6.0 # Apache-2.0
requests>=2.10.0,!=2.12.2,!=2.13.0 # Apache-2.0
python-keystoneclient>=3.8.0 # Apache-2.0
python-dateutil>=2.4.2 # BSD