Python 异常：错误：尝试绘制没有纹理集的精灵

所以我基本上是在使用python和arcade库开发一个自顶向下的2d游戏，我对它还不熟悉。 下面是我的角色的简单空闲动画代码。

我不太确定，但此时我得到了错误

    # load texture for ideal standing
    self.idle_texture = []
    for i in range(4):
        texture = load_texture(f"{main_path}/idle_anim_{i}.png")
        self.idle_texture.append(texture)

在上面的代码中

而且我的角色没有翻转

def update_animation(self, delta_time: float = 1/60):
    # Figure out if we need to face left or right
    if self.change_x < 0 and self.character_face_direction == RIGHT_FACING:
        self.character_face_direction = LEFT_FACING
    elif self.change_x > 0 and self.character_face_direction == LEFT_FACING:
        self.character_face_direction = RIGHT_FACING

    # idle animation
    if self.change_x == 1 and self.change_y == 0:
        self.texture = self.idle_texture[self.character_face_direction]
        return


class MyGame(arcade.Window):
""" Main application class. """
 
def __init__(self):
    # call the parent class and set up the window
    super().__init__(SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_TITLE)

    # Set the path to start with this program
    file_path = os.path.dirname(os.path.abspath(__file__))
    os.chdir(file_path)
    # Player sprite
    self.player_sprite = None

    # sprites list we need
    self.player_list = None
    self.wall_list = None
    self.bullet_list = None
    self.item_list = None
    self.background_list = None

    # OUR physics engine
    self.physics_engine = None

    arcade.set_background_color(arcade.csscolor.BLACK)

def setup(self):
    """ Set up the game here. Call this function to restart the game. """

    # Create the sprite list
    self.player_list = arcade.SpriteList()
    self.wall_list = arcade.SpriteList()
    self.background_list = arcade.SpriteList()

    # creating player sprite
    self.player_sprite = PlayerCharacter()

    self.player_sprite.center_x = 100
    self.player_sprite.center_y = 100
    # add to player to sprite list
    self.player_list.append(self.player_sprite)

    self.physics_engine = arcade.PhysicsEngineSimple(self.player_sprite, self.wall_list)

def on_key_press(self, key, modifiers):
    """ Called whenever a key is pressed. """

    if key == arcade.key.UP or key == arcade.key.W:
        self.player_sprite.change_y = PLAYER_MOVEMENT_SPEED
    elif key == arcade.key.DOWN or key == arcade.key.S:
        self.player_sprite.change_y = -PLAYER_MOVEMENT_SPEED
    elif key == arcade.key.LEFT or key == arcade.key.A:
        self.player_sprite.change_x = -PLAYER_MOVEMENT_SPEED
    elif key == arcade.key.RIGHT or key == arcade.key.D:
        self.player_sprite.change_x = PLAYER_MOVEMENT_SPEED

def on_key_release(self, key, modifiers):
    """ Called when the key is released """
    if key == arcade.key.UP or key == arcade.key.W:
        self.player_sprite.change_y = 0
    elif key == arcade.key.DOWN or key == arcade.key.S:
        self.player_sprite.change_y = 0
    elif key == arcade.key.LEFT or key == arcade.key.A:
        self.player_sprite.change_x = 0
    elif key == arcade.key.RIGHT or key == arcade.key.D:
        self.player_sprite.change_x = 0

def on_update(self, delta_time):
    """ Movement and game logic. """

    # Move the player with the physics engine
    self.physics_engine.update()

    # Move the player
    self.player_list.update()

    # update the player animation
    self.player_list.update_animation()

def on_draw(self):
    """ Render the screen. """

    arcade.start_render()
    self.player_list.draw()
    self.wall_list.draw()
    self.background_list.draw()
    # Code to draw the screen goes here


def main():
    """ Main method. """
    window = MyGame()
    window.setup()
    arcade.run()


if __name__ == "__main__":
main()

def更新动画（自身，增量时间：浮点=1/60）：
#弄清楚我们是需要面对左边还是右边
如果self.change\u x<0且self.character\u face\u direction==右向：
self.character\u face\u direction=左向
elif self.change\u x>0且self.character\u face\u direction==左向：
self.character\u face\u direction=右侧
#空闲动画
如果self.change_x==1和self.change_y==0：
self.texture=self.idle\u纹理[self.character\u face\u方向]
返回
类MyGame（街机窗口）：
“”“主应用程序类。”“”
定义初始化（自）：
#调用父类并设置窗口
超级（）
#设置此程序开始的路径
file_path=os.path.dirname（os.path.abspath（uu file_uu））
chdir（文件路径）
#玩家精灵
self.player\u sprite=无
#我们需要的雪碧清单
self.player\u list=无
self.wall\u list=无
self.bullet\u list=无
self.item_list=无
self.background\u list=无
#我们的物理引擎
self.physics\u引擎=无
街机。设置背景颜色（arcade.csscolor.BLACK）
def设置（自）：
“”“在此处设置游戏。调用此函数重新启动游戏。”“”
#创建精灵列表
self.player_list=arcade.SpriteList（）
self.wall_list=arcade.SpriteList（）
self.background_list=arcade.SpriteList（）
#创建玩家精灵
self.player\u sprite=PlayerCharacter（）
self.player\u sprite.center\u x=100
self.player\u sprite.center\u y=100
#添加到玩家到精灵列表
self.player\u list.append（self.player\u精灵）
self.physics\u engine=arcade.PhysicsEngineSimple（self.player\u精灵、self.wall\u列表）
def on_键按（自身、键、修改器）：
“”“每当按键时调用。”“”
如果key==arcade.key.UP或key==arcade.key.W：
self.player\u sprite.change\u y=玩家\u移动\u速度
elif key==arcade.key.DOWN或key==arcade.key.S：
self.player\u sprite.change\u y=-player\u MOVEMENT\u SPEED
elif key==arcade.key.LEFT或key==arcade.key.A：
self.player\u sprite.change\u x=-player\u MOVEMENT\u SPEED
elif key==arcade.key.RIGHT或key==arcade.key.D：
self.player\u sprite.change\u x=玩家\u移动\u速度
钥匙释放时的def（自身、钥匙、修改器）：
“”“释放密钥时调用”“”
如果key==arcade.key.UP或key==arcade.key.W：
self.player\u sprite.change\u y=0
elif key==arcade.key.DOWN或key==arcade.key.S：
self.player\u sprite.change\u y=0
elif key==arcade.key.LEFT或key==arcade.key.A：
self.player\u sprite.change\u x=0
elif key==arcade.key.RIGHT或key==arcade.key.D：
self.player\u sprite.change\u x=0
def on_更新（自身、增量时间）：
“”“运动和游戏逻辑。”“”
#用物理引擎移动玩家
self.physics_engine.update（）
#移动玩家
self.player_list.update（）
#更新播放器动画
self.player\u list.update\u animation（）
def on_牵引（自）：
“”“渲染屏幕。”“”
arcade.start_render（）
self.player_list.draw（）
self.wall_list.draw（）
self.background_list.draw（）
#绘制屏幕的代码如下所示
def main（）：
“”“主方法。”“”
window=MyGame（）
window.setup（）
arcade.run（）
如果名称=“\uuuuu main\uuuuuuuu”：
main（）

我的问题是，每当我执行此代码时，它都会为我的角色空闲动画显示“异常：错误：尝试绘制没有纹理集的精灵”。 或者它将显示文件未找到错误的错误。

---

如果有人能帮助我，我将处理这个问题两天。

这通常发生在纹理加载失败时。当找不到纹理时，较新的arcade版本现在将崩溃并出现相应的错误。少点混乱！

def update_animation(self, delta_time: float = 1/60):
    # Figure out if we need to face left or right
    if self.change_x < 0 and self.character_face_direction == RIGHT_FACING:
        self.character_face_direction = LEFT_FACING
    elif self.change_x > 0 and self.character_face_direction == LEFT_FACING:
        self.character_face_direction = RIGHT_FACING

    # idle animation
    if self.change_x == 1 and self.change_y == 0:
        self.texture = self.idle_texture[self.character_face_direction]
        return


class MyGame(arcade.Window):
""" Main application class. """
 
def __init__(self):
    # call the parent class and set up the window
    super().__init__(SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_TITLE)

    # Set the path to start with this program
    file_path = os.path.dirname(os.path.abspath(__file__))
    os.chdir(file_path)
    # Player sprite
    self.player_sprite = None

    # sprites list we need
    self.player_list = None
    self.wall_list = None
    self.bullet_list = None
    self.item_list = None
    self.background_list = None

    # OUR physics engine
    self.physics_engine = None

    arcade.set_background_color(arcade.csscolor.BLACK)

def setup(self):
    """ Set up the game here. Call this function to restart the game. """

    # Create the sprite list
    self.player_list = arcade.SpriteList()
    self.wall_list = arcade.SpriteList()
    self.background_list = arcade.SpriteList()

    # creating player sprite
    self.player_sprite = PlayerCharacter()

    self.player_sprite.center_x = 100
    self.player_sprite.center_y = 100
    # add to player to sprite list
    self.player_list.append(self.player_sprite)

    self.physics_engine = arcade.PhysicsEngineSimple(self.player_sprite, self.wall_list)

def on_key_press(self, key, modifiers):
    """ Called whenever a key is pressed. """

    if key == arcade.key.UP or key == arcade.key.W:
        self.player_sprite.change_y = PLAYER_MOVEMENT_SPEED
    elif key == arcade.key.DOWN or key == arcade.key.S:
        self.player_sprite.change_y = -PLAYER_MOVEMENT_SPEED
    elif key == arcade.key.LEFT or key == arcade.key.A:
        self.player_sprite.change_x = -PLAYER_MOVEMENT_SPEED
    elif key == arcade.key.RIGHT or key == arcade.key.D:
        self.player_sprite.change_x = PLAYER_MOVEMENT_SPEED

def on_key_release(self, key, modifiers):
    """ Called when the key is released """
    if key == arcade.key.UP or key == arcade.key.W:
        self.player_sprite.change_y = 0
    elif key == arcade.key.DOWN or key == arcade.key.S:
        self.player_sprite.change_y = 0
    elif key == arcade.key.LEFT or key == arcade.key.A:
        self.player_sprite.change_x = 0
    elif key == arcade.key.RIGHT or key == arcade.key.D:
        self.player_sprite.change_x = 0

def on_update(self, delta_time):
    """ Movement and game logic. """

    # Move the player with the physics engine
    self.physics_engine.update()

    # Move the player
    self.player_list.update()

    # update the player animation
    self.player_list.update_animation()

def on_draw(self):
    """ Render the screen. """

    arcade.start_render()
    self.player_list.draw()
    self.wall_list.draw()
    self.background_list.draw()
    # Code to draw the screen goes here


def main():
    """ Main method. """
    window = MyGame()
    window.setup()
    arcade.run()


if __name__ == "__main__":
main()