Boolean values are the two constant objects False and
True. They are used to represent truth values (although other
values can also be considered false or true). In numeric contexts
(for example when used as the argument to an arithmetic operator),
they behave like the integers 0 and 1, respectively. The built-in
function bool() can be used to cast any value to a Boolean,
if the value can be interpreted as a truth value (see section Truth
Value Testing above).
