auto save

diy1.py

 import time
 e=time.time()
 list1 = []
-for a in range(0, 1000):
-    for b in range(0, 1000):
+for a in range(0, 100):
+    for b in range(0, 100):
             list1.append(0)
 g=time.time()
 print(list1,g-e)
\ No newline at end of file