auto save

diy1.py

-import time
-a=time.time()
-print('开始时间为:',a)
-list = []
-for i in range(0,1000):
-    for j in range(0,1000):
-        list.insert(0,0)
-b = time.time()
-print('结束时间为为:',b)
-c = b-a
-print('消耗时长:',c)
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