save project

my_Tetris.py

 import pygame
 from pygame import locals
-
+import random
 pygame.init()   # 初始化
 score = 0
 grid_size = 20  # 格子大小
@@ -70,7 +70,7 @@ while True:
             elif event.key == locals.K_RIGHT:    # 向左
                 if center[1] < 15:
                     center[1] += 1
-                    
+
             elif event.key == locals.K_DOWN:    # 向下
                 if center[0] < 25:
                     center[0] += 1