def test_mod_error(): raises(ZeroDivisionError, lambda: mod(2, 0))
def test_mod_error(): raises(ZeroDivisionError, lambda: mod(2, 0))
def test_mod(): assert mod(13, 5) == 3 assert mod(-4, 7) == 3
def test_mod(): assert mod(13, 5) == 3 assert mod(-4, 7) == 3