1.索引修改

l=[1,2,3,4,5,6]
l[0]='a'
print(l)

['a', 2, 3, 4, 5, 6]

2..list1+list2

l1=[1,2,3,4,5,6]
l2=['a','b']
print(l1+l2)

[1, 2, 3, 4, 5, 6, 'a', 'b']

3.append（追加列表）

l1=[1,2,3,4,5,6]
l2=['a','b']
l1.append(l2)
print(l1)

[1, 2, 3, 4, 5, 6, ['a', 'b']]

4.extend(追加列表的元素)

l1=[1,2,3,4,5,6]
l2=['a','b']
l1.extend(l2)
print(l1)

[1, 2, 3, 4, 5, 6, 'a', 'b']

5.insert(索引，插入内容)

l1=[1,2,3,4,5,6]
l2=['a','b']
l1.insert(3,l2)
print(l1)

[1, 2, 3, ['a', 'b'], 4, 5, 6]

6.分片赋值

分片插入元素

l=[1,2,3,4,5,6]
l[1:1]='a'#相当于插入
print(l)

[1, 'a', 2, 3, 4, 5, 6]

l1=[1,2,3,4,5,6]
l2=['a','b']
l1[len(l1):]=l2
print(l1)

[1, 2, 3, 4, 5, 6, 'a', 'b']

分片修改元素

l=[1,2,3,4,5,6]
l[3:]='a'
print(l)

[1, 2, 3, 'a']

分片取值[::隔几个数取值]

l1=[1,2,3,4,5,6,7]
print(l1[::-2])
l1=[1,2,3,4,5,6,7]
print(l1[1::2])

[7, 5, 3, 1]
[2, 4, 6]