def assertNumContains(self, haystack, needle, count):
        real_count = haystack.count(needle)
        self.assertEqual(real_count, count, (real_count, needle, count) % "Found %d instances of '%s', expected %d")
dataset/ETHPy150Open django/django/tests/model_options/test_tablespaces.py/TablespacesTests.assertNumContains/swapped operands of `%`