python操作三大主流数据库(12)python操作redis的api框架redis-py简单使用
python操作三大主流数据库(12)python操作redis的api框架redis-py简单使用
redispy安装
安装及简单使用：https://github.com/andymccurdy/redis-py
api参考文档：http://redis-py.readthedocs.io/en/latest/
1.安装redis-py
pip install redis C:\Users\ajie>workon flask (flask) C:\Users\ajie>d: (flask) d:\python_envs\flask>pip install redis
2.简单测试
#coding:utf-8 import redis # redis.Redis()兼容老版本，redis.StrictRedis()不考虑兼容性 r = redis.Redis(host='localhost', port=6379, db=0) # r = redis.StrictRedis(host = 'localhost', port=6379, db=0) user1 = r.get('user1') print(user1) (flask) d:\python_envs\flask>python python_redis.py b'jhon'
3.python操作redis的常用方法
#coding:utf-8 import redis class Base(object): def __init__(self): self.r = redis.StrictRedis(host = 'localhost', port=6379, db=0) class StringTest(object): def __init__(self): # redis.Redis()兼容老版本，redis.StrictRedis()不考虑兼容性 # self.r = redis.Redis(host='localhost', port=6379, db=0) self.r = redis.StrictRedis(host = 'localhost', port=6379, db=0, decode_responses=True) def test_set(self): ''' set -- 设置值 ''' rest = self.r.set('user2', 'amy') print(rest) return rest def test_get(self): '''get -- 获取值''' rest = self.r.get('user2') print(rest) return rest def test_mset(self): ''' mset -- 设置多个键值对 ''' d = { 'user3': 'Bob', 'user4': 'Bobx' } rest = self.r.mset(d) print(rest) return rest def test_mget(self): ''' mset -- 设置多个键值对 ''' d = ['user3','user4'] rest = self.r.mget(d) print(rest) return rest def test_del(self): ''' del删除键值 ''' rest = self.r.delete('user3') print(rest) def test_push(self): ''' lpush/rpush -- 从左/右插入数据 ''' t = ['Amy', 'Jhon'] # 如果不加*则会把两个元素当做整体存入 rest = self.r.lpush('l_eat3', *t) print(rest) rest = self.r.lrange('l_eat3', 0, -1) print(rest) def test_pop(self): ''' lpop/rpop 移除最左/右边的元素并返回值''' rest = self.r.lpop('l_eat3') print(rest) rest = self.r.lrange('l_eat3', 0, -1) print(rest) class SetTest(Base): def test_sadd(self): ''' sadd --添加元素 ''' l = ['cat', 'dog', 'monkey'] # rest = self.r.sadd('zoo2', l) rest = self.r.sadd('zoo2', *l) print(rest) rest = self.r.smembers('zoo2') print(rest) def test_srem(self): ''' srem -- 删除元素 ''' rest = self.r.srem('zoo2', 'monkey') print(rest) rest = self.r.smembers('zoo2') print(rest) def test_sinter(self): ''' sinter --返回元素的交集 ''' rest = self.r.sinter('zoo2', 'zoo1') print(rest) class HashTest(Base): def hset_test(self): ''' hset设置新闻内容 self.r.hset(1,'title','朝鲜特种部队视频公布展示士兵身体素质与意志') self.r.hset(1,'content','content01') self.r.hset(1,'img_url','/static/img/news/01.png') self.r.hset(1,'is_valid','true') self.r.hset(1,'news_type','推荐') self.r.hset(2,'title','男子长得像\"祁同伟\"挨打 打人者:为何加害检察官') self.r.hset(2,'content','因与热门电视剧中人物长相相近,男子竟然招来一顿拳打脚踢。4月19日,打人男子周某被抓获。半个月前,酒后的周某看到KTV里有一名男子很像电视剧中的反派。二话不说,周某冲上去就问你为什么要加害检察官?男子莫名其妙,回了一句神经病。周某一听气不打一处来,对着男子就是一顿拳打脚踢,嘴里面还念叨着,“叫你加害检察官,我打死你!”随后,周某趁机逃走。受伤男子立即报警,周某被上海警方上网通缉') self.r.hset(2,'img_url','/static/img/news/02.png') self.r.hset(2,'is_valid','true') self.r.hset(2,'news_type','百家') ''' ''' mset/mget -- 设置/获取散列值''' rest = self.r.hset('stu:002','name','tom') print(rest) rest = self.r.hexists('stu:002','name') print(rest) rest = self.r.hget('stu:002', 'name') print(rest) def mset_test(self): ''' 获取新闻的数据 ''' # rest = self.r.hget(1,'title') # print(rest.decode('utf-8')) # rest = self.r.hget(1, 'news_type') # print(rest.decode('utf-8')) # rest = self.r.hget(3,'title') # print(rest.decode('utf-8')) # rest = self.r.hget(3, 'news_type') # print(rest.decode('utf-8')) # mset和hkeys m = { 'name':'lily', 'age':18, 'grade':90 } rest = self.r.hmset('stu:003', m) print(rest) rest = self.r.hkeys('stu:003') print(rest) rest = self.r.hvals('stu:003') print(rest) def test_hgetall(self): data = self.r.hgetall('news:3') print(data['title'].decode('utf-8')) print(data['content'].decode('utf-8')) def main(): # st = StringTest() # st.test_set() # st.test_get() # st.test_mset() # st.test_mget() # st.test_del() # st.test_push() # st.test_pop() # set_test = SetTest() # set_test.test_sadd() # set_test.test_srem() # set_test.test_sinter() ht = HashTest() # ht.mset_test() # ht.hset_test() # ht.hget_test() ht.test_hgetall() if __name__ == "__main__": main()
