Return a Boolean value, i.e. one of ``True`` or ``False``.*x* is converted using the standard :ref:`truth testing procedure <truth>`.If *x* is false or omitted, this returns ``False``; otherwise, it returns ``True``.The :class:`bool` class is a subclass of :class:`int` (see :ref:`typesnumeric`). It cannot be subclassed further.Its only instances are ``False`` and ``True`` (see :ref:`typebool`).