【发布时间】：2019-05-17 08:28:19
【问题描述】：
所以我在运行程序时收到此错误消息。
Traceback（最近一次调用最后一次）： 文件“C:\Users\GUESS\OneDrive\Desktop\Computer Science\Game\Changable.py”，第 229 行，在 mainWindow.setup() 文件“C:\Users\GUESS\OneDrive\Desktop\Computer Science\Game\Changable.py”，第 190 行，在设置中 self.enemy_list.append() AttributeError: 'NoneType' 对象没有属性 'append'
在输入敌人之前它运行良好。任何反馈表示赞赏。我正在使用 python 街机/get-pip.py。我尝试使用 http://arcade.academy/ 并从那里获得了一些我的代码，但它似乎仍然无法正常工作
这是我的代码：
### Samuel Ball ###
import arcade
SCALING = 0.5
SPRITE_NATIVE_SIZE = 128
SPRITE_SIZE = int(SPRITE_NATIVE_SIZE * SCALING)
SCREEN_WIDTH = 1024
SCREEN_HEIGHT = 768
# How many pixels to keep as a minimum margin between the character
# and the edge of the screen.
VIEWPORT_MARGIN = 40
RIGHT_MARGIN = 150
#Physics
MOVEMENT_SPEED = 5
JUMP_SPEED = 14
GRAVITY = 0.5
sceneTiles = [
[ 2, 2, 2, 00, 00, 00, 00, 00, 00, 00, 00, 5, 5, 5, 2 ], #Bottom Row
[ 2, 2, 2, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 2, 2 ],
[ 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 2, 2 ],
[ 00, 00, 00, 1, 00, 00, 00, 00, 00, 00, 00, 00, 3, 2, 4 ],
[ 00, 00, 00, 00, 00, 1, 00, 00, 00, 00, 00, 00, 00, 00, 00 ],
[ 00, 00, 00, 00, 00, 00, 00, 1, 00, 00, 00, 00, 00, 00, 00 ],
[ 00, 00, 00, 00, 00, 00, 00, 00, 00, 1, 00, 00, 00, 00, 00 ],
[ 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00 ],
[ 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 3, 2, 4 ],
[ 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00 ],
[ 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00 ], #Top Row
]
decorativeTiles = [
[ 00, 00, 00, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3 ], #Bottom Row
[ 00, 00, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4 ],
[ 6, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00 ],
[ 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00 ],
[ 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00 ],
[ 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00 ],
[ 1, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00 ],
[ 00, 00, 2, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00 ],
[ 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00 ],
[ 2, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00 ],
[ 00, 00, 1, 00, 2, 00, 1, 00, 2, 00, 1, 0, 2, 00, 1 ], #Top Row
]
class MyGameWindow(arcade.Window):
allSpritesList = arcade.SpriteList()
wallList = arcade.SpriteList()
player = arcade.AnimatedWalkingSprite()
def __init__(self, width, height):
super().__init__(width, height)
#arcade.set_background_color([101, 216, 255])
arcade.set_background_color(arcade.color.AERO_BLUE)
# set up player
self.score = 0
self.player_sprite = None
self.physics_engine = None
self.view_left = 0
self.view_bottom = 0
self.game_over = False
def on_draw(self):
arcade.start_render()
self.allSpritesList.draw()
self.wall_list = arcade.SpriteList()
self.enemy_list = arcade.SpriteList()
self.player_list = arcade.SpriteList()
def setup(self):
# sprite list
self.wall_list = None
self.enemy_list = None
self.player_list = None
leftPos = 0
bottomPos = 0
for row in sceneTiles:
for counter in range(0, len(row)):
if row[counter] > 0:
if row[counter] == 1:
wall = arcade.Sprite("images/tiles/box.png", SCALING)
elif row[counter] == 2:
wall = arcade.Sprite("images/tiles/grass.png", SCALING)
elif row[counter] == 3:
wall = arcade.Sprite("images/tiles/grassCliffLeft.png", SCALING)
elif row[counter] == 4:
wall = arcade.Sprite("images/tiles/grassCliffRight.png", SCALING)
wall.bottom = bottomPos
wall.left = leftPos
self.wallList.append(wall)
self.allSpritesList.append(wall)
else:
wall = arcade.Sprite("images/tiles/grassCenter.png", SCALING)
leftPos = leftPos + wall.width
bottomPos = bottomPos + wall.height
leftPos = 0
leftPos = 0
bottomPos = 0
for row in decorativeTiles:
for counter in range(0, len(row)):
if row[counter] > 0:
if row[counter] == 1:
dec = arcade.Sprite("images/items/cloud1.png", SCALING)
elif row[counter] == 2:
dec = arcade.Sprite("images/items/cloud2.png", SCALING)
elif row[counter] == 3:
dec = arcade.Sprite("images/tiles/liquidWater.png", SCALING)
elif row[counter] == 4:
dec = arcade.Sprite("images/tiles/liquidWaterTop_mid.png", SCALING)
elif row[counter] == 5:
dec = arcade.Sprite("images/tiles/fence.png", SCALING)
elif row[counter] == 6:
dec = arcade.Sprite("images/tiles/signRight.png", SCALING)
elif row[counter] == 7:
dec = arcade.Sprite("images/items/mushroomRed.png", SCALING)
dec.bottom = bottomPos
dec.left = leftPos
self.allSpritesList.append(dec)
else:
dec = arcade.Sprite("images/tiles/grassCenter.png", SCALING)
leftPos = leftPos + dec.width
bottomPos = bottomPos + dec.width
leftPos = 0
self.player.stand_right_textures = []
self.player.stand_right_textures.append(arcade.load_texture("images/player/p1_stand.png", scale=SCALING))
self.player.stand_left_textures = []
self.player.stand_left_textures.append(arcade.load_texture("images/player/p1_stand.png", scale=SCALING, mirrored=True))
self.player.walk_right_textures = []
self.player.walk_right_textures.append(arcade.load_texture("images/player/p1_walk/PNG/p1_walk01.png", scale=SCALING))
self.player.walk_right_textures.append(arcade.load_texture("images/player/p1_walk/PNG/p1_walk02.png", scale=SCALING))
self.player.walk_right_textures.append(arcade.load_texture("images/player/p1_walk/PNG/p1_walk03.png", scale=SCALING))
self.player.walk_right_textures.append(arcade.load_texture("images/player/p1_walk/PNG/p1_walk03.png", scale=SCALING))
self.player.walk_right_textures.append(arcade.load_texture("images/player/p1_walk/PNG/p1_walk04.png", scale=SCALING))
self.player.walk_right_textures.append(arcade.load_texture("images/player/p1_walk/PNG/p1_walk05.png", scale=SCALING))
self.player.walk_right_textures.append(arcade.load_texture("images/player/p1_walk/PNG/p1_walk06.png", scale=SCALING))
self.player.walk_right_textures.append(arcade.load_texture("images/player/p1_walk/PNG/p1_walk07.png", scale=SCALING))
self.player.walk_right_textures.append(arcade.load_texture("images/player/p1_walk/PNG/p1_walk08.png", scale=SCALING))
self.player.walk_right_textures.append(arcade.load_texture("images/player/p1_walk/PNG/p1_walk09.png", scale=SCALING))
self.player.walk_right_textures.append(arcade.load_texture("images/player/p1_walk/PNG/p1_walk10.png", scale=SCALING))
self.player.walk_right_textures.append(arcade.load_texture("images/player/p1_walk/PNG/p1_walk11.png", scale=SCALING))
self.player.walk_left_textures = []
self.player.walk_left_textures.append(arcade.load_texture("images/player/p1_walk/PNG/p1_walk01.png", scale=SCALING, mirrored=True))
self.player.walk_left_textures.append(arcade.load_texture("images/player/p1_walk/PNG/p1_walk02.png", scale=SCALING, mirrored=True))
self.player.walk_left_textures.append(arcade.load_texture("images/player/p1_walk/PNG/p1_walk03.png", scale=SCALING, mirrored=True))
self.player.walk_left_textures.append(arcade.load_texture("images/player/p1_walk/PNG/p1_walk04.png", scale=SCALING, mirrored=True))
self.player.walk_left_textures.append(arcade.load_texture("images/player/p1_walk/PNG/p1_walk05.png", scale=SCALING, mirrored=True))
self.player.walk_left_textures.append(arcade.load_texture("images/player/p1_walk/PNG/p1_walk06.png", scale=SCALING, mirrored=True))
self.player.walk_left_textures.append(arcade.load_texture("images/player/p1_walk/PNG/p1_walk07.png", scale=SCALING, mirrored=True))
self.player.walk_left_textures.append(arcade.load_texture("images/player/p1_walk/PNG/p1_walk08.png", scale=SCALING, mirrored=True))
self.player.walk_left_textures.append(arcade.load_texture("images/player/p1_walk/PNG/p1_walk09.png", scale=SCALING, mirrored=True))
self.player.walk_left_textures.append(arcade.load_texture("images/player/p1_walk/PNG/p1_walk10.png", scale=SCALING, mirrored=True))
self.player.walk_left_textures.append(arcade.load_texture("images/player/p1_walk/PNG/p1_walk11.png", scale=SCALING, mirrored=True))
self.player.walk_up_textures = []
self.player.walk_up_textures.append(arcade.load_texture("images/player/p1_jump.png", scale=SCALING))
self.player.walk_down_textures = []
self.player.walk_down_textures.append(arcade.load_texture("images/player/p1_stand.png", scale=SCALING))
# Starting position of the player
self.player.texture_change_distance = 5
self.player.center_x = 30
self.player.center_y = SCREEN_HEIGHT // 2
self.physicsEngine = arcade.PhysicsEnginePlatformer(self.player, self.wallList, gravity_constant=GRAVITY)
# -- Draw an enemy on the ground
enemy = arcade.Sprite("images/enemies/blockerMad.png", SCALING)
enemy.bottom = SPRITE_SIZE
enemy.left = SPRITE_SIZE * 2
# Set enemy initial speed
enemy.change_x = 2
self.enemy_list.append()
# -- Draw a enemy on the platform
enemy = arcade.Sprite("images/enemies/blockerMad.png", SCALING)
enemy.bottom = SPRITE_SIZE * 4
enemy.left = SPRITE_SIZE * 4
# Set boundaries on the left/right the enemy can't cross
enemy.boundary_right = SPRITE_SIZE * 8
enemy.boundary_left = SPRITE_SIZE * 3
enemy.change_x = 2
self.enemy_list.append()
def update(self, delta_tie):
self.player.update_animation()
self.physicsEngine.update()
def on_key_press(self, key, modifiers):
if key == arcade.key.UP or key == arcade.key.SPACE:
if self.physicsEngine.can_jump():
self.player.change_y = MOVEMENT_SPEED * 3
elif key == arcade.key.DOWN:
self.player.change_y = -MOVEMENT_SPEED
elif key == arcade.key.LEFT:
self.player.change_x = -MOVEMENT_SPEED
elif key == arcade.key.RIGHT:
self.player.change_x = MOVEMENT_SPEED
def on_key_release(self, key, modifiers):
if key == arcade.key.UP or key == arcade.key.DOWN:
self.player.change_y = 0
elif key == arcade.key.LEFT or key == arcade.key.RIGHT:
self.player.change_x = 0
mainWindow = MyGameWindow(SCREEN_WIDTH, SCREEN_HEIGHT)
mainWindow.setup()
arcade.run()
【问题讨论】：
标签： python-3.x arcade