old_contents: import unittest
  
  from aiozmq import _parse_version
  
  
  class VersionTests(unittest.TestCase):
  
      def test_alpha(self):
          self.assertEqual((0, 1, 2, 'alpha', 2), _parse_version('0.1.2a2'))
          self.assertEqual((1, 2, 3, 'alpha', 0), _parse_version('1.2.3a'))
  
      def test_beta(self):
          self.assertEqual((0, 1, 2, 'beta', 2), _parse_version('0.1.2b2'))
          self.assertEqual((0, 1, 2, 'beta', 0), _parse_version('0.1.2b'))
  
      def test_rc(self):
          self.assertEqual((0, 1, 2, 'candidate', 5), _parse_version('0.1.2rc5'))
          self.assertEqual((0, 1, 2, 'candidate', 0), _parse_version('0.1.2rc'))
  
      def test_final(self):
          self.assertEqual((0, 1, 2, 'final', 0), _parse_version('0.1.2'))
  
      def test_invalid(self):
          self.assertRaises(ImportError, _parse_version, '0.1')
          self.assertRaises(ImportError, _parse_version, '0.1.1.2')
          self.assertRaises(ImportError, _parse_version, '0.1.1z2')
  
new_contents: import unittest
  
  from aiozmq import _parse_version
  
  
  class VersionTests(unittest.TestCase):
  
      def test_alpha(self):
          self.assertEqual((0, 1, 2, 'alpha', 2), _parse_version('0.1.2a2'))
          self.assertEqual((1, 2, 3, 'alpha', 0), _parse_version('1.2.3a'))
  
      def test_beta(self):
          self.assertEqual((0, 1, 2, 'beta', 2), _parse_version('0.1.2b2'))
          self.assertEqual((0, 1, 2, 'beta', 0), _parse_version('0.1.2b'))
  
      def test_rc(self):
          self.assertEqual((0, 1, 2, 'candidate', 5), _parse_version('0.1.2c5'))
          self.assertEqual((0, 1, 2, 'candidate', 0), _parse_version('0.1.2c'))
  
      def test_final(self):
          self.assertEqual((0, 1, 2, 'final', 0), _parse_version('0.1.2'))
  
      def test_invalid(self):
          self.assertRaises(ImportError, _parse_version, '0.1')
          self.assertRaises(ImportError, _parse_version, '0.1.1.2')
          self.assertRaises(ImportError, _parse_version, '0.1.1z2')
  
subject: Fix version