@Test
 public void testComparability3() {
   PythonVersion v331 = new PythonVersion(3, 3, "3.3.1");
   PythonVersion v333 = new PythonVersion(3, 3, "3.3.3");
   int z = v331.compareTo(v333);
   assertTrue(z < 0);
   assertFalse(v331.equals(v333));
 }