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
@@ -69,8 +69,10 @@ while True:
                     center[1] += 1
 
             elif event.key == locals.K_LEFT:    # 向左
-                if center[1] > 1:
-                    center[1] -= 1
+                center[1] = center[1] - 1
+                if check(center) == False：
+                    center[1] = center[1] + 1
+                    
 
             elif event.key == locals.K_DOWN:    # 向下
                 if center[0] < 25: