def fire(self, rate, target=None):
if self.fire_rate > 0:
self.fire_rate -= 1
return
self.fire_rate = rate
shot = Shot(self.screen, self.x, self.y + 40, self, target)
player = self.screen.player
dx = player.x - self.x
dy = player.y - self.y - 15
total = sqrt(dx ** 2 + dy ** 2)
shot.xvel = dx / total * 15
shot.yvel = dy / total * 15
shot.range = 100
