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diy.py

@@ -3,5 +3,6 @@
 # 省略繁杂情节，刘关张三人一起冲入战场，围攻吕布：
 a=['吕布']
 b=['袁术','公孙瓒','关羽','张飞','刘备','曹操']
-
+a.extend(b[2:5])
+print(a)
 

ii.py

+sheep=[1,0,0,0,0]
+for i in range(20):
+    temp=sheep[1]+sheep[3]
+    sheep.insert(0,temp)
+    sheep.pop()
+total=sum(sheep)
+print("母羊的总数是:",total)
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