save project

diy1.py

-list1 = []
-for a in range(0, 1000):
-    for b in range(0, 1000):
-        list1.insert(0, 0)
\ No newline at end of file

diy2.py

+import time
+list1 = []
+start_time=time.time()
+for a in range(0, 1000):
+    for b in range(0, 1000):
+        list1.append(0)
+end_time=time.time()
+print('开始的时间为：',start_time)
+print('结束的时间为：',end_time)
+print('耗费的时间为：',end_time-start_time)