列表

li=[1,2,"age",["11","1"],"abc"]

中括号括起来

分割每一个元素

列表中的元素可以是数字 字符串 列表 布尔值 都能放进去

li=[1,2,"age",["11","1"],"abc"]
print(li[2])
print(li[3:4])


age
[['11', '1']]

索引取值

print（ li [] ）

切片，切片结果也是列表

修改
li=[1,2,"age",["11","1"],"abc"]
li[3]= "name"
print(li)

li=[1,2,"age",["11","1"],"abc"]
li[0:3]=["aaa","bbb","ccc"]
print(li)
删除
li=[1,2,"age",["11","1"],"abc"]
del li[2]
print(li)
切片删除
li=[1,2,"age",["11","1"],"abc"]
del li[0:2]
print(li)
in 操作
li=[1,2,"age",["11","1"],"abc"]
v="age" in li
print(v)

 

# 字符串转换成列表
s="qwertyuiop"
new_li=list(s)
print(new_li)



['q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p']

# 只能转换可迭代的 数字不可以

 

# 列表转换成字符串
s=""
li=[1,2,"age","11","1","abc"]
for i in li:
    s=s+str(i)
print(s)



12age111abc


# 列表内没有数字时可以用join 将列表转换成字符串
li=["age","11","1","abc"]
v="".join(li)
print(v)


age111abc