old_contents: import collections
  from client import Client
  
  
  class EtcdResult(collections.namedtuple(
      'EtcdResult',
      [
          'action',
          'index',
          'key',
          'prevValue',
          'value',
          'expiration',
          'ttl',
          'newKey'])):
  
      def __new__(
              cls,
              action=None,
              index=None,
              key=None,
              prevValue=None,
              value=None,
              expiration=None,
              ttl=None,
              newKey=None):
          return super(EtcdResult, cls).__new__(
              cls,
              action,
              index,
              key,
              prevValue,
              value,
              expiration,
              ttl,
              newKey)
  
  
  class EtcdException(Exception):
      """
      Generic Etcd Exception.
      """
  
      pass
  
new_contents: import collections
  from client import Client
  
  
  class EtcdResult(collections.namedtuple(
      'EtcdResult',
      [
          'action',
          'index',
          'key',
          'prevValue',
          'value',
          'expiration',
          'ttl',
          'newKey'])):
  
      def __new__(
              cls,
              action=None,
              index=None,
              key=None,
              prevValue=None,
              value=None,
              expiration=None,
              ttl=None,
              newKey=None):
          return super(EtcdResult, cls).__new__(
              cls,
              action,
              index,
              key,
              prevValue,
              value,
              expiration,
              ttl,
              newKey)
  
  
  class EtcdException(Exception):
      """
      Generic Etcd Exception.
      """
  
      pass
  
  # Attempt to enable urllib3's SNI support, if possible
  # Blatantly copied from requests.
  try:
      from urllib3.contrib import pyopenssl
      pyopenssl.inject_into_urllib3()
  except ImportError:
      pass
  
subject: Add optional support for SSL SNI