auto save

a.py

+from PIL import Image
+
+import matplotlib.pyplot as plt
+img = Image.open("cat.png")
+plt.imshow(img)
+plt.show()
\ No newline at end of file

snake.py

@@ -7,27 +7,63 @@ pygame.init()
 # 创建一个窗口
 screen = pygame.display.set_mode((660, 480))
 FPS=pygame.time.Clock()
-x,y = 240,120
+
 # 背景
 background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
+left = pygame.image.load('left.png')
+up = pygame.image.load('up.png')
+down = pygame.image.load('down.png')
+
+x,y = 240,120
+position =  [(180,90),(180,120),(210,120),(x,y)]
+
+setheading ="right"
+snake_head =right
 
 while True:
     for event in pygame.event.get():
         if event.type == locals.QUIT:
-            # 接收到退出事件后退出程序
             exit()
-    x+=30
+        if event.type==locals.KEYDOWN:
+            if event.key ==locals.K_RIGHT and setheading != "left":
+                setheading ="right"
+                snake_head =right
+            if event.key ==locals.K_LEFT and setheading != "right":
+                setheading ="left"
+                snake_head =left
+            if event.key ==locals.K_UP and setheading != "down":
+                setheading ="up"
+                snake_head =up
+            if event.key ==locals.K_DOWN and setheading != "up":
+                setheading ="down"
+                snake_head =down
+
+    if setheading =="right":
+        x +=30
+    elif  setheading =="left":
+        x -=30
+    elif  setheading =="up":
+        y -=30
+    else:
+        y +=30
+
+    position.append((x,y))
+
+    position.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
-    screen.blit(right, (x, y))
+    screen.blit(snake_head, (x, y))
     # 将贪吃蛇的身体画上去
-    screen.blit(body, (210, 120))
-    screen.blit(body, (180, 120))
-    screen.blit(body, (180, 90))
+    for i in range(len(position)-1):
+        screen.blit(body,position[i])
+
+    # screen.blit(body, (210, 120))
+    # screen.blit(body, (180, 120))
+    # screen.blit(body, (180, 90))
     # 将果实画上去
     screen.blit(food, (360, 300))
     # 刷新画面