flake8; python_version >= '3.6'
flake8-bugbear; python_version >= '3.6'
importlib-metadata<3.0; python_version < '3.6'
packaging<21.0; python_version < '3.6'
pytest~=4.6; python_version < '3.6'
pytest>=4.6; python_version >= '3.6' 
pathlib2 < 2.3.7; python_version == '3.5.0' or python_version == '3.5.1'
typing >= 3.7.4; python_version < '3.5'
mypy_extensions >= 0.3.0
typing_extensions >= 3.7.4; python_version >= '3.6'
typing_extensions >= 3.7.4, < 3.10; python_version < '3.6'