def contact(self, player: sprite.Sprite):
"""Detect collision between player and enemy polygons and reduce their hull.
player: player sprite"""
for enemy in sprite.spritecollide(player, self, False,
sprite.collide_circle):
player.knockback(enemy)
enemy.damage()
player.damage()
def harm(self, player: sprite.Sprite):
"""Detect collision between player and enemy fire and reduce hull.
player: player sprite"""
for _ in sprite.spritecollide(player, self, True,
sprite.collide_circle):
player.damage()