plumbum>=1.6.6
attrs>=17.0
numpy>=1.12
pandas>=0.22
six>=1.11

[:python_version < "3.4"]
enum34>=1.1

[:python_version < "3.5"]
pathlib2>=2.3

[:python_version < "3.7"]
importlib_resources>=1.0

[notebook]
graphviz
