save project

diy1.py

+import time
+begin_time=time.time()
 list1 = []
 list1 = []
-for a in range(0, 1000):
-    for b in range(0, 1000):
-        list1.insert(0, 0)
+list2=[]
+for a in range(0, 100):
+    for b in range(0, 100):
\ No newline at end of file
+        list2.insert(0, 0)
+for c in range(100):
+    list1.extend(list2)
+end_time=time.time()
+process_time=end_time-begin_time
+print('总时间为'+str(process_time))
\ No newline at end of file