初识Redis educoder

第1关：Redis中的数据结构

redis-cli
set hello redis
lpush educoder-list hello
rpush educoder-list educoder
rpush educoder-list bye 
rpop educoder-list 



sadd educoder-set c
sadd educoder-set  python
sadd educoder-set redis
srem educoder-set c


hset educoder-hash python language
hset educoder-hash ruby language
hset educoder-hash redis database 
hdel educoder-hash ruby


zadd educoder-zset 200 jack
zadd educoder-zset 400 rose
zadd educoder-zset 100 lee

第二关:使用Python与Redis交互

#!/usr/bin/env python
#-*- coding:utf-8 -*-
import redis
def write_redis():
    #********* Begin *********#
    
   
# 创建连接池  
    pool = redis.ConnectionPool(host='127.0.0.1', port=6379, decode_responses=True)
    # 创建客户端并连接到 Redis  
    r1 = redis.Redis(connection_pool=pool)  
    r1.set("test1", "hello")  
    r1.set("test2", "Redis")  
   
    #********* End *********#

第三关:使用Python+Redis实现文章投票网站后端功能

#!/usr/bin/env python
#-*- coding:utf-8 -*-

import time

ONE_WEEK_IN_SECONDS = 7 * 24 * 60 * 60

def article_vote(r, user_id, article_id):
    cutoff = time.time() - ONE_WEEK_IN_SECONDS

    # 请在下面完成要求的功能
    #********* Begin *********#
    cutoff = time.time() - ONE_WEEK_IN_SECONDS  
    if r.zscore('time', article_id) < cutoff:  
        return
    if r.sadd('voted:' + article_id, user_id):  
        r.zincrby('score', article_id, 1)  

    #********* End *********#

def post_article(r, user, title, link):
    article_id = str(r.incr('article'))

    voted = 'voted:' + article_id
    r.sadd(voted, user)  
    r.expire(voted, ONE_WEEK_IN_SECONDS)
    now = time.time()
    article = 'article:' + article_id
    # 请在下面完成要求的功能
    #********* Begin *********#
    r.hmset(article, {  
        'title': title,  
        'link': link,  
        'poster': user,  
    })
    r.zadd('score', article_id, 1)  
    r.zadd('time', article_id, now)


    #********* End *********#

    return article_id

def get_articles(r, start, end, order='score'):
    articles = []
    ids = r.zrevrange(order, start, end)  
    # 请在下面完成要求的功能
    #********* Begin *********#
    for id in ids:  
        article_data = r.hgetall(id)  
        article_data['id'] = id  
        articles.append(article_data)


    #********* End *********#

    return articles