It might have to do with Python 3 removing the classic int type and moving all int operations to longs. If you compare Python2's Objects/intobject.c's i_divmod() function to Python3's ...
The default behaviour for division has changed between Python 2 and Python 3. In Python 3, dividing an integer by an integer returns a float. e.g.
Some results have been hidden because they may be inaccessible to you
Show inaccessible results