auto save

demo.py

+'''
+bros=["刘备","关羽","张飞"]
+#进行位置交换  一：
+bros[0]="关羽"
+bros[1]="刘备"
+#进行位置交换  二：
+bros[0],bros[1]="关羽","刘备"
+#进行位置交换  三：
+bros[0],bros[1]=bros[1],bros[0]
+print(bros)
+
+
+a=["袁绍","刘备","关羽","张飞","曹操"]
+#通过索引删除
+a.pop(2) 
+#通过元素删除 remove(元素)
+a.remove("关羽")
+print(a)
+a=["袁绍","刘备","关羽","张飞","曹操"]
+b=["华雄"]
+#通过索引插入值
+# b.insert(1,"关羽")
+#在末尾插入
+b.append("关羽")
+c=["颜良","文丑"]
+#在末尾插入一个列表
+b.extend(c)
+print(b)
+'''
+a=["袁绍","刘备","关羽","张飞","曹操"]
+b=["吕布"]
+#切片   取左不取右   不写全都取
+b.extend(a[1:4])
+print(b)
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diy.py

 # 臂力挑战赛
 # 快用你机灵的小脑瓜想想，如何将刘强和他的臂力值自动插入到hero列表中？
 name='刘强'
-power=90
+power=40
 hero=['赵一',30,'丁二',37,'孙五',52,'王猛',89,'周亮',98]
 # 自动排序
-for i in range(1,len(hero),2):
-    if power<hero[i]:
-        hero.insert(i-1,name)
-        hero.insert(i,power)
-        break
 
 print(hero)
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