auto save

snake.py

@@ -57,12 +57,12 @@ while True:
     position.append((x, y))
     # 贪吃蛇吃到苹果
     if x == apple_x and y == apple_y:
-        num1 = random.randint(1, 22)
-        num2 = random.randint(1, 16)
-        apple_x = num1 * 30 - 30
-        apple_y = num2 * 30 - 30
-else:
-    position.pop(0)
+        num1 = random.randint(1, 22)    # 横排第几个格子
+        num2 = random.randint(1, 16)    # 纵排第几个格子
+        apple_x = num1 * 30 - 30        # 苹果的x坐标
+        apple_y = num2 * 30 - 30        # 苹果的y坐标
+    else:
+        position.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇的头画上去