auto save

diy1.py

 import time
 s=time.time()
-print("开始时间为："，s)
+print("开始时间为：",s)
 
 list1 = []
 for a in range(0, 1000):
     for b in range(0, 1000):
-        list1.insert(-1, 0)
+        list1.append(0)
 e=time.time()
 print("结束时间为：",e)
 r=e-s