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()