Redis simple storage folder

scene

redis database , Usually the storage format is as follows

Separate separately , No folders , It doesn't look beautiful

But I want to achieve this storage ： Folder nature

Ways of realization ： Namely key It's worth adding : Number

How to save double layers

.hset( 'user:zhangsan', 'user', {"name": "zhangsan", "age": 13, "addr": " Shanghai "})

How to save three layers Plus a colon

.hset( 'userinfo:shanghai:zhangsan', 'user', {"name": "zhangsan", "age": 13, "addr": " Shanghai "})

How to value

Bring a colon k Also do k that will do

hget('userinfo:shanghai:zhangsan', 'user')


.hget('user: Liu Yongxing ', 'user')

notes ：key value , Chinese is not recommended , If you use Chinese, you won't be killed

Expiration time

 establish String Type data , Be similar to redis-cli Medium  set key value
set(name, value, ex=None, px=None, nx=False, xx=False)
 Parameter meaning ：
ex  Expiration time （ second ）
px  Expiration time （ millisecond ）
nx  If set to True, only name When there is no , At present set Operation before execution , Otherwise, do not execute 
xx  If set to True, only name In existence , At present set Operation before execution , Otherwise, do not execute 
setnx(name, value)              Set the value , Only name When there is no , Perform the operation of adding settings 
setex(name, value, time)        Set value and expiration time （ Seconds or timedelta object ）
psetex(name, time_ms, value)    Set the expiration time （ Milliseconds or timedelta object ）