old_contents: 
  try:
      from jose.backends.pycrypto_backend import RSAKey
  except ImportError:
      from jose.backends.cryptography_backend import CryptographyRSAKey as RSAKey
  
  try:
      from jose.backends.cryptography_backend import CryptographyECKey as ECKey
  except ImportError:
      from jose.backends.ecdsa_backend import ECDSAECKey as ECKey
  
new_contents: 
  try:
      from jose.backends.pycrypto_backend import RSAKey
  except ImportError:
      try:
          from jose.backends.cryptography_backend import CryptographyRSAKey as RSAKey
      except ImportError:
          from jose.backends.rsa_backend import RSAKey
  
  try:
      from jose.backends.cryptography_backend import CryptographyECKey as ECKey
  except ImportError:
      from jose.backends.ecdsa_backend import ECDSAECKey as ECKey
  
subject: Enable Python RSA backend as a fallback.