Python’s type-hinting syntax, added in Python 3.5 ... source of types to hint keyword arguments used in a function. The Unpack variadic generic, introduced in version 3.11, is used for this.

tuple() - a function to list a sequence of values. Note: in Python, indexes start at 0, and the maximum is non-inclusive; for example, specifying the range 1 to 5 will include the second, third, ...