False The false value of the

exit(code=None) Objects that when printed, print a message like “Use quit() or Ctrl-D (i.e. EOF) to exit”, and when called,

license credits Objects that when printed, print a message like “Type license() to see the full license text”, and

None The sole value of the type NoneType. None is frequently used to represent the absence of a value

copyright license credits Objects that when printed, print a message

NotImplemented Special value which should be returned by the binary special methods (e.g. __eq__(), __lt__()

True The true value of the

Ellipsis The same as .... Special value used mostly in conjunction with extended slicing syntax for user-defined

__debug__ This constant is true if Python was not started with an -O option. See also the assert statement

credits Objects that when printed, print a message like “Type license() to see the full license text”, and when called, display