def _move(self, particle):
        particle.x += particle.dx
        particle.y += particle.dy
        if particle.y <= self._end_y:
            # Rounding errors may mean we need to end slightly early.
            particle.y = self._end_y
            particle.time = 1 - self._life_time

        return int(particle.x), int(particle.y)
dataset/ETHPy150Open peterbrittain/asciimatics/asciimatics/particles.py/Rocket._move/swapped operands of `-`