try: import unittest.mock as mock except ImportError: import mock from pkg_resources import evaluate_marker @mock.patch.dict('pkg_resources.MarkerEvaluation.values', python_full_version=mock.Mock(return_value='2.7.10')) def test_lexicographic_ordering(): """ Although one might like 2.7.10 to be greater than 2.7.3, the marker spec only supports lexicographic ordering. """ assert evaluate_marker("python_full_version > '2.7.3'") is False