ansible/test/runner/requirements/constraints.txt

coverage >= 4.2, != 4.3.2 # features in 4.2+ required, avoid known bug in 4.3.2 on python 2.6
pywinrm >= 0.2.1 # 0.1.1 required, but 0.2.1 provides better performance
pylint >= 1.5.3, < 1.7.0 # 1.4.1 adds JSON output, but 1.5.3 fixes bugs related to JSON output
sphinx < 1.6 ; python_version < '2.7' # sphinx 1.6 and later require python 2.7 or later
wheel < 0.30.0 ; python_version < '2.7' # wheel 0.30.0 and later require python 2.7 or later
yamllint != 1.8.0 ; python_version < '2.7' # yamllint 1.8.0 requires python 2.7+ while earlier/later versions do not
isort < 4.2.8 # 4.2.8 changes import sort order requirements which breaks previously passing pylint tests
pycrypto >= 2.6 # Need features found in 2.6 and greater
ncclient >= 0.5.2 # Need features added in 0.5.2 and greater
idna < 2.6 # requests requires idna < 2.6, but cryptography will cause the latest version to be installed instead