save project

snake.py

@@ -22,7 +22,7 @@ while True:
         if event.type == locals.QUIT:
             # 接收到退出事件后退出程序
             exit()
-        if event.type == locals.KEYDOWN
+        if event.type == locals.KEYDOWN:
             if event.key == locals.K_RIGHT and setheading !="left":
                setheading = 'right'
             if event.key == locals.K_LEFT and setheading !="right":
@@ -31,15 +31,15 @@ while True:
                setheading = 'up'
             if event.key == locals.K_DOWN and setheading !="up":      
                setheading = 'down'  
-    if setheading = 'right':
+    if setheading == 'right':
         x += 30
-    elif setheading = 'left':
+    elif setheading == 'left':
         x -= 30 
-    elif setheading = 'up':
+    elif setheading == 'up':
         y -= 30 
     else:
         y += 30
-    x=x+30
+    
     position.append((x,y))
     position.pop(0)
     # 将背景图画上去