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python操作redis的方法

Jun 10, 2016 pm 03:09 PM
python redis

本文实例讲述了python操作redis的方法。分享给大家供大家参考。具体如下:

#!/usr/bin/python
#coding=utf-8
import redis
class CRedis:
  def __init__(self):
    self.host = 'localhost'
    self.port = 6379
    self.db = 0
    self.r = redis.Redis(host = self.host, port = self.port, db = self.db)
  #1. strings 类型及操作
  #设置 key 对应的值为 string 类型的 value
  def set(self, key, value):
    return self.r.set(key, value)
  #设置 key 对应的值为 string 类型的 value。如果 key 已经存在,返回 0,nx 是 not exist 的意思
  def setnx(self, key, value):
    return self.r.setnx(key, value)
  #设置 key 对应的值为 string 类型的 value,并指定此键值对应的有效期
  def setex(self, key, time, value):
    return self.r.setex(key, time, value)
  #设置指定 key 的 value 值的子字符串
  #setrange name 8 gmail.com
  #其中的 8 是指从下标为 8(包含 8)的字符开始替换
  def setrange(self, key, num, value):
    return self.r.setrange(key, num, value)
  #获取指定 key 的 value 值的子字符串
  def getrange(self, key, start ,end):
    return self.r.getrange(key, start, end)
  #mget(list)
  def get(self, key):
    if isinstance(key, list):
      return self.r.mget(key)
    else:
      return self.r.get(key)
  #删除
  def remove(self, key):
    return self.r.delete(key)
  #自增
  def incr(self, key, default = 1):
    if (1 == default):
      return self.r.incr(key)
    else:
      return self.r.incr(key, default)
  #自减
  def decr(self, key, default = 1):
    if (1 == default):
      return self.r.decr(key)
    else:
      return self.r.decr(key, default)
  #2. hashes 类型及操作
  #根据email获取session信息
  def hget(self, email):
    return self.r.hget('session', email)
  #以email作为唯一标识,增加用户session
  def hset(self, email, content):
    return self.r.hset('session', email, content)
  #获取session哈希表中的所有数据
  def hgetall(self):
    return self.r.hgetall('session')
  #删除hashes
  def hdel(self, name, key = None):
    if(key):
      return self.r.hdel(name, key)
    return self.r.hdel(name)
  #清空当前db
  def clear(self):
    return self.r.flushdb()
  #3、lists 类型及操作
  #适合做邮件队列
  #在 key 对应 list 的头部添加字符串元素
  def lpush(self, key ,value):
    return self.r.lpush(key, value)
  #从 list 的尾部删除元素,并返回删除元素
  def lpop(self, key):
    return self.r.plush(key)
if __name__ == '__main__':
  r = CRedis()

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希望本文所述对大家的Python程序设计有所帮助。

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