old_contents: DEBUG = True
  
  STATIC_DIR = None
  
  #postprocessing options:
  STD_DOCTYPE = '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">'
  STD_STYLESHEETS = [
      ("/pony/static/blueprint/screen.css", "screen, projection"),
      ("/pony/static/blueprint/print.css", "print"),
      ("/pony/static/blueprint/ie.css.css", "screen, projection", "if IE"),
      ("/pony/static/css/default.css", "screen, projection"),
      ]
  BASE_STYLESHEETS_PLACEHOLDER = '<!--PONY-BASE-STYLESHEETS-->'
  COMPONENT_STYLESHEETS_PLACEHOLDER = '<!--PONY-COMPONENTS-STYLESHEETS-->'
  SCRIPTS_PLACEHOLDER = '<!--PONY-SCRIPTS-->'
  
  # reloading options:
  RELOADING_CHECK_INTERVAL = 1.0  # in seconds
  
  # logging options:
  LOG_TO_SQLITE = None
  LOGGING_LEVEL = None
  LOGGING_PONY_LEVEL = None
  
  #auth options:
  ##MAX_COOKIE_SIZE = 3000
  MAX_COOKIE_SIZE = 0 ##for memcahed work test
  MAX_SESSION_CTIME = 60*24  # one day
  MAX_SESSION_MTIME = 60*2  # 2 hours
  MAX_LONGLIFE_SESSION = 14  # 14 days
  COOKIE_SERIALIZATION_TYPE = 'json' # may be 'json' or 'pickle'
  COOKIE_NAME = 'pony'
  COOKIE_PATH = '/'
  COOKIE_DOMAIN = None
  HASH_ALGORITHM = None  # None means sha-1
  CONVERSATION_FIELD_NAME = '_c'
  
  # pickle options:
  PICKLE_START_OFFSET = 230
  PICKLE_HTML_AS_PLAIN_STR = True
  
  # encoding options for pony.pathces.repr
  RESTORE_ESCAPES = True
  SOURCE_ENCODING = None
  CONSOLE_ENCODING = None
  
  # db options
  MAX_ROWS_COUNT = 1000
  
  # debugging options
  DEBUGGING_REMOVE_ADDR = True
  DEBUGGING_RESTORE_ESCAPES = True
  
new_contents: DEBUG = True
  
  STATIC_DIR = None
  
  #postprocessing options:
  STD_DOCTYPE = '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">'
  STD_STYLESHEETS = [
      ("/pony/static/blueprint/screen.css", "screen, projection"),
      ("/pony/static/blueprint/print.css", "print"),
      ("/pony/static/blueprint/ie.css.css", "screen, projection", "if IE"),
      ("/pony/static/css/default.css", "screen, projection"),
      ]
  BASE_STYLESHEETS_PLACEHOLDER = '<!--PONY-BASE-STYLESHEETS-->'
  COMPONENT_STYLESHEETS_PLACEHOLDER = '<!--PONY-COMPONENTS-STYLESHEETS-->'
  SCRIPTS_PLACEHOLDER = '<!--PONY-SCRIPTS-->'
  
  # reloading options:
  RELOADING_CHECK_INTERVAL = 1.0  # in seconds
  
  # logging options:
  LOG_TO_SQLITE = None
  LOGGING_LEVEL = None
  LOGGING_PONY_LEVEL = None
  
  #auth options:
  ##MAX_COOKIE_SIZE = 3000
  MAX_COOKIE_SIZE = 0 ##for memcahed work test
  MAX_SESSION_CTIME = 60*24  # one day
  MAX_SESSION_MTIME = 60*2  # 2 hours
  MAX_LONGLIFE_SESSION = 14  # 14 days
  COOKIE_SERIALIZATION_TYPE = 'json' # may be 'json' or 'pickle'
  COOKIE_NAME = 'pony'
  COOKIE_PATH = '/'
  COOKIE_DOMAIN = None
  HASH_ALGORITHM = None  # None means sha-1
  
  # pickle options:
  PICKLE_START_OFFSET = 230
  PICKLE_HTML_AS_PLAIN_STR = True
  
  # encoding options for pony.pathces.repr
  RESTORE_ESCAPES = True
  SOURCE_ENCODING = None
  CONSOLE_ENCODING = None
  
  # db options
  MAX_ROWS_COUNT = 1000
  
  # debugging options
  DEBUGGING_REMOVE_ADDR = True
  DEBUGGING_RESTORE_ESCAPES = True
  
subject: Remove CONVERSATION_FIELD_NAME from pony.options