http://docs.python.org/lib/module-logging.html

Inside the explanation of logging.debug an example code is showed:

 FORMAT = "%(asctime)-15s %(clientip)s %(user)-8s %(message)s"
 logging.basicConfig(format=FORMAT)
 dict = { 'clientip' : '192.168.0.1', 'user' : 'fbloggs' }
 logging.warning("Protocol problem: %s", "connection reset", extra=d)


In the code "dict" is created but never used. 
When logging.warning is called the author use the argument 'd' instead of 'dict' and no reference to 'd' exists:

 logging.warning("Protocol problem: %s", "connection reset", extra=d)

Thanks for the report, fixed in rev. 55154, 55155.