six<2.0.0,>=1.11.0

[:python_version<"3.5"]
typing<=3.10.0.0,>=3.6.4

[dev]
flake8<4.0.0,>=3.5.0
tox<4.0.0,>=3.0.0
isort<5.0.0,>=4.0.0
pytest<5.0.0,>=4.0.0

[dev:python_version >= "3.4"]
mypy>=0.620
