[docs] [issue17576] PyNumber_Index() is not int-subclass friendly (or operator.index() docos lie)

Serhiy Storchaka added the comment:

The ssize_t functions deliberately ignore lossy int conversions (e.g. from floats) - that's why they only work on types that implement __index__.

They ignore __index__. ---------- _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue17576> _______________________________________