save project

2.py

+list1=[]
+
+print(list1)
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diy1.py

 import time
 import time
-list= []
-for a in range(0, 1000):
-        for b in range(0, 1000):
-            --=insert(0, 0)
-b=time.time()
+list1= []
+list2=[0,0,0,0,0,0,0,0,0,0]
+start_time=time.time()
+print("开始时间为：",start_time)
+for a in range(100000):
+        list1.extend(list2)
+end_time=time.time()
+print("结束时间为：",end_time)
 
 
-c=b-a
-
-print("总共耗时："，c)
+c=end_time-start_time
+print("总共耗时：",c)
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