save project

diy1.py

+import time
+a = time.time()
+print("开始时间：",a)
 list1 = []
 for a in range(0, 1000):
     for b in range(0, 1000):
-        list1.insert(0, 0)
\ No newline at end of file
+        list1.insert(0, 0)
+b = time.time()
+print("结束时间：",b)
+print("总共用时：",b-a)