old_contents: import os
  import yaml
  import logging
  
  CONF_FILE = os.path.join(os.environ['HOME'], '.teuthology.yaml')
  
  log = logging.getLogger(__name__)
  
  
  class _Config(object):
      """
      This class is intended to unify teuthology's many configuration files and
      objects. Currently it serves as a convenient interface to
      ~/.teuthology.yaml and nothing else.
      """
      def __init__(self):
          if os.path.exists(CONF_FILE):
              self.__conf = yaml.safe_load(file(CONF_FILE))
          else:
              log.debug("%s not found", CONF_FILE)
              self.__conf = {}
  
      # This property declaration exists mainly as an example; it is not
      # necessary unless you want to, say, define a set method and/or a
      # docstring.
      @property
      def lock_server(self):
          """
          The URL to your lock server. For example, Inktank uses:
  
              http://teuthology.front.sepia.ceph.com/locker/lock
          """
          return self.__conf.get('lock_server')
  
      # This takes care of any and all of the rest.
      # If the parameter is defined, return it. Otherwise return None.
      def __getattr__(self, name):
          return self.__conf.get(name)
  
  config = _Config()
  
new_contents: import os
  import yaml
  import logging
  
  CONF_FILE = os.path.join(os.environ['HOME'], '.teuthology.yaml')
  
  log = logging.getLogger(__name__)
  
  
  class _Config(object):
      """
      This class is intended to unify teuthology's many configuration files and
      objects. Currently it serves as a convenient interface to
      ~/.teuthology.yaml and nothing else.
      """
      def __init__(self):
          if os.path.exists(CONF_FILE):
              self.__conf = yaml.safe_load(file(CONF_FILE))
          else:
              log.debug("%s not found", CONF_FILE)
              self.__conf = {}
  
      # This property declaration exists mainly as an example; it is not
      # necessary unless you want to, say, define a set method and/or a
      # docstring.
      @property
      def lock_server(self):
          """
          The URL to your lock server. For example, Inktank uses:
  
              http://teuthology.front.sepia.ceph.com/locker/lock
          """
          return self.__conf.get('lock_server')
  
      @property
      def ceph_git_base_url(self):
          """
          The base URL to use for ceph-related git repositories.
  
          Defaults to https://github.com/ceph/
          """
          base_url = self.__conf.get('ceph_git_base_url')
          base_url = base_url or "https://github.com/ceph/"
          return base_url
  
      # This takes care of any and all of the rest.
      # If the parameter is defined, return it. Otherwise return None.
      def __getattr__(self, name):
          return self.__conf.get(name)
  
  config = _Config()
  
subject: Add config.ceph_git_base_url