코딩 출력 오류... 질문있습니다...!

안녕하세요, 선생님

질문이 있습니다!

오류가 왜 났는지 잘 모르겠습니다...

class Unit:
  def __init__(self, name, hp, speed):
    self.name=name
    self.hp=hp
    self.speed=speed

    def move(self, location):
      print("[지상 유닛 이동]")
      print("{0} : {1} 방향으로 이동합니다 [속도 {2}]"\
            .format(self.name, location, self.speed))
      
class AttackUnit(Unit):
  def __init__(self, name, hp, speed):
   Unit.__init__(self, name, hp, speed)
   self.damage=damage 

   def attack(self, location):
     print("{0} : {1} 방향으로 적군을 공격합니다. [공격력 {2}]".format(self.name, location, self.damage))
     def damaged(self, damage):
       print("{0} : {1} 데미지를 입었습니다.".format(self.name, damage))
       self.hp -= damage
       print("{0} : 현재 체력은 {1}입니다.".format(self.name, self.hp))
       if self.hp <= 0:
         print("{0} : 파괴되었습니다.".format(self.name))
        
class Flyable:
  def __init__(self, flying_speed):
    self.fly=flying_speed
    def fly(self, name, location):
      print("{0} : {1} 방향으로 날아갑니다. [속도 {2}]"\
            .format(name, location, self.flying_speed))

class FlyableAttackUnit(AttackUnit, Flyable):
  def __init__(self, name, hp, damage, flying_speed):
    AttackUnit.__init__(self, name, hp, 0, damage) 
    Flyable.__init__(self, flying_speed)
    def move(self, location):
      print("[공중 유닛 이동]")
      self.fly(self.name, location) ##ERROR

vulture=AttackUnit("벌처", 80, 10, 20) 
battlecruiser=FlyableAttackUnit("배틀클루저", 500, 25, 3) 
vulture.move("11시") 
battlecruiser.move(battlecruiser.name, "9시")

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