ply<4.0,>=3.4
six~=1.15

[dev]
cython>=0.28.4
flake8>=2.5
pytest>=2.8
sphinx-rtd-theme>=0.1.9
sphinx>=1.3
pytest>=6.1.1
tornado<6.0,>=4.0

[tornado]
tornado<6.0,>=4.0
