# External Python modules required by unit tests.
docutils >= 0.9; platform_python_implementation != 'IronPython'
enum34; python_version < '3.0'
jsonschema; platform_python_implementation != 'IronPython' and platform_python_implementation != 'Jython'
typing_extensions; python_version == '3.6' or python_version == '3.7'
