future
aenum
six
deprecated

[:python_version == "3.4"]
lxml<=4.3.0

[:python_version >= "3.5"]
lxml>=3.7.0

[test]
pytest>=4.6
pytest-cov>=2.5.1
flake8>=3.4.1
funcsigs==1.0.2
mock==2.0.0
