python redis连接_Python连接Redis连接配置

1. 测试连接:

Python 2.7.8 (default, Oct 20 2014, 15:05:19)

[GCC4.9.1] on linux2

Type"help", "copyright", "credits" or "license" formore information.>>> importredis>>> redisClient = redis.StrictRedis(host='127.0.0.1',port=6379,db=0)

>>> redisClient.set('test_redis','Hello wyl')

True>>> value = redisClient.get('test_redis')>>> printvalue

Hello wyl>>> redisClient.delete('test_redis')1

>>> value = redisClient.get('test_redis')>>> printvalue

None>>>

在此之前必须确保python和redis正确安装和配置.

>>>dir(redis)

['AuthenticationError', 'BlockingConnectionPool', 'BusyLoadingError', 'Connection', 'ConnectionError', 'ConnectionPool', 'DataError', 'InvalidResponse', 'PubSubError', 'ReadOnlyError', 'Redis', 'RedisError', 'ResponseError', 'SSLConnection', 'StrictRedis', 'TimeoutError', 'UnixDomainSocketConnection', 'VERSION', 'WatchError', '__all__', '__builtins__', '__doc__', '__file__', '__name__', '__package__', '__path__', '__version__', '_compat', 'client', 'connection', 'exceptions', 'from_url', 'lock', 'utils']

2. 测试实例:

(1).把文本数据导入到redis:

***:~/Redis$ more redis.txt

wolys#wolysopen111 # wolys@21cn.com

coralshanshan#601601601 # zss1984@126.com

pengfeihuchao#woaidami # 294522652@qq.com

simulategirl#@#$9608125 # simulateboy@163.com

daisypp#12345678 # zhoushigang_123@163.com

sirenxing424#tfiloveyou # sirenxing424@126.com

raininglxy#1901061139 # lixinyu23@qq.com

leochenlei#leichenlei # chenlei1201@gmail.com

z370433835#lkp145566 # 370433835@qq.com

--创建命令脚本

***:~/Redis$ cat imp_red.pyimportredisimportre

pool= redis.ConnectionPool(host='127.0.0.1', port=6379)

r= redis.Redis(connection_pool=pool)

pipe=r.pipeline()

p=re.compile(r'(.*)\s#\s(.*)\s#\s(.*)');

pipe=r.pipeline()

f= open("redis.txt")

matchs=p.findall(f.read())for user inmatchs:

key='users_%s' %user[0].strip()

pipe.hset(key,'pwd',user[1].strip()).hset(key,'email',user[2].strip())

pipe.execute()

f.close()

执行脚本:

***:~/Redis$ python imp_red.py

查看redis数据:

***:~/Redis$ redis-cli127.0.0.1:6379> keys *

1) "users_pengfeihuchao"

2) "users_coralshanshan"

3) "users_leochenlei"

4) "users_sirenxing424"

5) "users_z370433835"

6) "users_raininglxy"

7) "users_daisypp"

8) "users_wolys"

9) "users_simulategirl"

127.0.0.1:6379>

3. redis的简单操作:

redis连接实例是线程安全的，可以直接将redis连接实例设置为一个全局变量，直接使用。如果需要另一个Redis实例(or Redis数据库)时，就需要重新创建redis连接实例来获取一个新的连接。同理，python的redis没有实现select命令。

Python 2.7.8 (default, Oct 20 2014, 15:05:19)

[GCC4.9.1] on linux2

Type"help", "copyright", "credits" or "license" formore information.>>> importredis>>> r = redis.Redis(host='127.0.0.1', port = 6379, db=0)>>> r.set('wu','yanlong')

True>>>r.get()

Traceback (most recent call last):

File"", line 1, in TypeError: get() takes exactly2 arguments (1given)>>> r.get('wu')'yanlong'

>>> r['wu']'yanlong'

>>>r.keys()

['users_pengfeihuchao', 'users_coralshanshan', 'users_leochenlei', 'users_sirenxing424', 'users_z370433835', 'users_raininglxy', 'wu', 'users_daisypp', 'users_wolys', 'users_simulategirl']>>> r.keys('wu')

['wu']>>>r.dbsize()10L

>>> r.delete('wu')1

>>>r.keys()

['users_pengfeihuchao', 'users_coralshanshan', 'users_leochenlei', 'users_sirenxing424', 'users_z370433835', 'users_raininglxy', 'users_daisypp', 'users_wolys', 'users_simulategirl']>>>r.dbsize()9L

>>>r.save()

True>>> r.get('wu')>>>r.flushdb()

True>>>r.keys()

[]>>>

4. pipeline()操作:

管道(pipeline)是redis在提供单个请求中缓冲多条服务器命令的基类的子类。它通过减少服务器-客户端之间反复的TCP数据库包，从而大大提高了执行批量命令的功能。

>>> p = r.pipeline() #创建一个管道

>>> p.set('hello','redislearn')

Pipeline>>

>>> p.sadd('fff','sss')

Pipeline>>

>>> p.incr('num')

Pipeline>>

>>>p.excute()

Traceback (most recent call last):

File"", line 1, in AttributeError:'Pipeline' object has no attribute 'excute'

>>>p.execute()

[True,1, 1]>>> r.get('hello')'redislearn'

>>>

管道的命令可以写在一起，如：

>>> p.set('hello','redis').p.sadd('faz','baz').incr('num').execute()

默认的情况下，管道里执行的命令可以保证执行的原子性，执行pipe = r.pipeline(transaction=False)可以禁用这一特性。