ipywidgets>=7.6.0
traittypes
numpy

[docs]
sphinx>=1.5
recommonmark
sphinx_rtd_theme
nbsphinx<0.4.0,>=0.2.13
jupyter_sphinx
nbsphinx-link
pytest_check_links
pypandoc

[examples]
vtk

[test]
pytest>=3.6
pytest-cov
nbval
