old_contents: import six
  import sys
  import test_helper
  import unittest
  
  from authy import AuthyException
  from authy.api import AuthyApiClient
  from authy.api.resources import Tokens
  from authy.api.resources import Users
  
  
  class ApiClientTest(unittest.TestCase):
  
      def setUp(self):
          self.api = AuthyApiClient(test_helper.API_KEY, test_helper.API_URL)
  
      def test_tokens(self):
          self.assertIsInstance(self.api.tokens, Tokens)
  
      def test_users(self):
          self.assertIsInstance(self.api.users, Users)
  
      def test_version(self):
          if six.PY3:
              self.assertRegex(self.api.version(), '\d.\d*')
          else:
              import re
              self.assertTrue(re.compile(r'\d.\d*').search(self.api.version()))
  
  
  if __name__ == "__main__":
  	    unittest.main()
  
new_contents: import six
  import sys
  import test_helper
  import unittest
  
  from authy import AuthyException
  from authy.api import AuthyApiClient
  from authy.api.resources import Tokens
  from authy.api.resources import Users
  
  
  class ApiClientTest(unittest.TestCase):
  
      def setUp(self):
          self.api = AuthyApiClient(test_helper.API_KEY, test_helper.API_URL)
  
      def test_tokens(self):
          self.assertIsInstance(self.api.tokens, Tokens)
  
      def test_users(self):
          self.assertIsInstance(self.api.users, Users)
  
      def test_version(self):
          if six.PY3:
              self.assertRegex(self.api.version(), r'\d.\d*')
          else:
              import re
              self.assertTrue(re.compile(r'\d.\d*').search(self.api.version()))
  
  
  if __name__ == "__main__":
  	    unittest.main()
  
subject: Fix deprecation warnings due to invalid escape sequences.