save project

my_Tetris.py

@@ -75,14 +75,14 @@ while True:
                 center[0] += 1
                 if check(center) == False:
                     center[0] -= 1
-            elif event.key == locals.K_UP:
-                old_index = index
-                index+=1
-                if index >= len(shape):
-                    index = 0
+            elif event.key == locals.K_UP:#按上更换形状
+                old_index = index#老变量等于新变量
+                index+=1#下一个形状
+                if index >= len(shape):#如果超出列表长度
+                    index = 0#变为第一个
                 current_shape = shape[index]
-                if check(center) == False:
-                    index = old_index
+                if check(center) == False:#如果变后超出背景
+                    index = old_index#变回来
                     current_shape = shape[index]
 
     # 将背景图画上去