div w/o div

div_wo_div.py

from math import log, e, copysign

def div(x, y):
    """ divide x by y without using / operator
    """
    sign = x * y
    res = e ** (log(abs(x)) - log(abs(y)))
    res = copysign(res, sign)
    rounded = int(round(res))
    if rounded * y == x:
        return rounded
    else:
        return res

assert div(4, 2) == 2
assert div(10, 2) == 5
assert round(div(5,2) * 10) == 25
assert div(-4, 2) == -2