define-float-division.md

define-print-function

The change in python3 is sometimes overlooked: the division operator / has been changed to always return float values. In python2 however, if the both values are integer, it returns an integer - dropping the fraction part that may have come from the division. So if code written for python3 is run in python2, the result values change.

Again, there is a future statement in python2 and the integer // division has been backported as well. So it is safe to force the code to the newer result strategy in either python2 or python3.

    # original
    def func1(x: Any):
        print(x / 2)

    # transformed
    from __future__ import division, print_function
    
    def func1(x):
        print(x / 2)

Note that if a --python-version of 3.0 or later is selected then this transformer will not be executed at all. If your code did already contain a from __future__ statement then the transformer does not double the import of division, so the code stays the same.