save project

diy1.py

+import time
+a=time.time()
+print("开始时间"+,)
 list1 = []
 for a in range(0, 1000):
     for b in range(0, 1000):
         list1.insert(0, 0)
+b=time.time()
+print("结束时间",b)
+c=b-a
+print("用时",c)
+