问AttributeError：“硬币”对象没有属性“硬币”

EN

class Coin(pygame.sprite.Sprite):

    def __init__(self):
        super().__init__()

        self.image = pygame.image.load("gold.png").convert()
        self.image.set_colorkey(BLACK)
        self.bump_sound = pygame.mixer.Sound("coin.wav")

        self.rect = self.image.get_rect()

coin = coin.Coin()

Traceback (most recent call last):
  File "C:\dev_projects\python\pygame_projects\final_project\main_game.py", line 39, in <module>
    coin = coin.Coin()
AttributeError: 'Coin' object has no attribute 'Coin'

class Coin(pygame.sprite.Sprite)
 |  simple base class for visible game objects
 |
 |  pygame.sprite.Sprite(*groups): return Sprite
 |
 |  The base class for visible game objects. Derived classes will want to
 |  override the Sprite.update() method and assign Sprite.image and Sprite.rect
 |  attributes.  The initializer can accept any number of Group instances that
 |  the Sprite will become a member of.
 |
 |  When subclassing the Sprite class, be sure to call the base initializer
 |  before adding the Sprite to Groups.
 |
 |  Method resolution order:
 |      Coin
 |      pygame.sprite.Sprite
 |      builtins.object
 |
 |  Methods defined here:
 |
 |  __init__(self)
 |      Initialize self.  See help(type(self)) for accurate signature.
 |
 |  ----------------------------------------------------------------------
 |  Methods inherited from pygame.sprite.Sprite:
 |
 |  __repr__(self)
 |      Return repr(self).
 |
 |  add(self, *groups)
 |      add the sprite to groups
 |
 |      Sprite.add(*groups): return None
 |
 |      Any number of Group instances can be passed as arguments. The
 |      Sprite will be added to the Groups it is not already a member of.
 |
 |  add_internal(self, group)
 |
 |  alive(self)
 |      does the sprite belong to any groups
 |
 |      Sprite.alive(): return bool
 |
 |      Returns True when the Sprite belongs to one or more Groups.
 |
 |  groups(self)
 |      list of Groups that contain this Sprite
 |
 |      Sprite.groups(): return group_list
 |
 |      Returns a list of all the Groups that contain this Sprite.
 |
 |  kill(self)
 |      remove the Sprite from all Groups
 |
 |      Sprite.kill(): return None
 |
 |      The Sprite is removed from all the Groups that contain it. This won't
 |      change anything about the state of the Sprite. It is possible to
 |      continue to use the Sprite after this method has been called, including
 |      adding it to Groups.
 |
 |  remove(self, *groups)
 |      remove the sprite from groups
 |
 |      Sprite.remove(*groups): return None
 |
 |      Any number of Group instances can be passed as arguments. The Sprite
 |      will be removed from the Groups it is currently a member of.
 |
 |  remove_internal(self, group)
 |
 |  update(self, *args)
 |      method to control sprite behavior
 |
 |      Sprite.update(*args):
 |
 |      The default implementation of this method does nothing; it's just a
 |      convenient "hook" that you can override. This method is called by
 |      Group.update() with whatever arguments you give it.
 |
 |      There is no need to use this method if not using the convenience
 |      method by the same name in the Group class.
 |
 |  ----------------------------------------------------------------------
 |  Data descriptors inherited from pygame.sprite.Sprite:
 |
 |  __dict__
 |      dictionary for instance variables (if defined)
 |
 |  __weakref__
 |      list of weak references to the object (if defined)

>>> coin = coin.Coin()
Traceback (most recent call last):
  File "<pyshell#2>", line 1, in <module>
    coin = coin.Coin()
AttributeError: 'Coin' object has no attribute 'Coin'