Redis interacts with Python

Install package

There are 3 ways to install Redis https://github.com/andymccurdy/redis-py

• The first type: into the virtual environment, the United? Install the package Redis

  Pip Install Redis

• The second type: into the virtual environment, the United installation package Redis

  Easy_install Redis

• The third kind: to the official?-Client Download Redis package source code, so that the source installation

  Step-by-step execution of wget https://github.com/andymccurdy/redis-py/archive/master.zip
  Unzip Master.zip
  CD Redis-py-master
  sudo python setup.py install

Tuning Module

• Introduction module

  From Redis import Strictredis

• This module provides StrictRedis对象 , for connection to Redis servers, and provides different methods for different types of operations, in-line interaction

Strictredis object? method

• Create an object from init, specify the parameter host, port with the specified server and end connection, host default is localhost,port default is 6379,db default is 0

sr = StrictRedis(host=‘localhost‘, port=6379, db=0)简写sr=StrictRedis()

• Depending on the type, have a different instance? The method can be adjusted, corresponding to the Redis command of the pre-learning, the parameters required by the method and the parameters of the command.

String

• Set
• Setex
• Mset
• Append
• Get
• Mget
• Key

Keys

• Exists
• Type
• Delete
• Expire
• GetRange
• Ttl

Hash

• Hset
• Hmset
• Hkeys
• Hget
• Hmget
• Hvals
• Hdel

List

• Lpush
• Rpush
• Linsert
• Lrange
• LSet
• Lrem

Set

• Sadd
• Smembers
• Srem

Zset

• Zadd
• Zrange
• Zrangebyscore
• Zscore
• Zrem
• Zremrangebyscore

Get ready

• Create a Redis directory on the desktop
• Open the Redis directory using Pycharm
• Create a redis_string.py file

from redis import *if __name__=="__main__":    try: #创建StrictRedis对象，与redis服务器建?连接 sr=StrictRedis() except Exception as e: print(e)

string-Increase

• Method set, add key, value, returns True if add succeeds, False if add failed
• Write the following code

from redis import *if __name__=="__main__":    try: #创建StrictRedis对象，与redis服务器建?连接 sr=StrictRedis() #添加键name，值为itheima result=sr.set(‘name‘,‘itheima‘) #输出响应结果，如果添加成功则返回True，否则返回False print(result) except Exception as e: print(e)

string-get

• A. Get, add the value corresponding to the key, return the corresponding value if the key exists, or none if the key does not exist
• Write the following code

from redis import *if __name__=="__main__":    try: #创建StrictRedis对象，与redis服务器建?连接 sr=StrictRedis() #获取键name的值 result = sr.get(‘name‘) #输出键的值，如果键不存在则返回None print(result) except Exception as e: print(e)

string-modification

• Method set, if the key already exists in the change, if the key does not exist in the add
• Write the following code

from redis import *if __name__=="__main__":    try: #创建StrictRedis对象，与redis服务器建?连接 sr=StrictRedis() #设置键name的值，如果键已经存在则进?修改，如果键不存在则进?添加 result = sr.set(‘name‘,‘itcast‘) #输出响应结果，如果操作成功则返回True，否则返回False print(result) except Exception as e: print(e)

string-Delete

• Method Delete, delete key and corresponding value, return the affected key number if Delete succeeds, or return 0
• Write the following code

from redis import *if __name__=="__main__":    try: #创建StrictRedis对象，与redis服务器建?连接 sr=StrictRedis() #设置键name的值，如果键已经存在则进?修改，如果键不存在则进?添加 result = sr.delete(‘name‘) #输出响应结果，如果删除成功则返回受影响的键数，否则则返回0 print(result) except Exception as e: print(e)

Get key

• The keys, get the key according to the regular expression
• Write the following code

from redis import *if __name__=="__main__":    try: #创建StrictRedis对象，与redis服务器建?连接 sr=StrictRedis() #获取所有的键 result=sr.keys() #输出响应结果，所有的键构成?个列表，如果没有键则返回空列表 print(result) except Exception as e: print(e)

Redis interacts with Python