【Python/Redis】书写Python程序访问Redis

本文用到的Python版本是Python 3.7.4，不保证在其它版本上也有同样效果。

安装完Python之后，就要安装redis模块，在cmd窗口中执行命令pip3 install redis,执行结果如下：

C:\hy\software>pip3 install redis
Collecting redis
  Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ConnectTimeoutError(<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x00000279BF69A548>, 'Connection to files.pythonhosted.org timed out. (connect timeout=15)')': /packages/a7/7c/24fb0511df653cf1a5d938d8f5d19802a88cef255706fdda242ff97e91b7/redis-3.5.3-py2.py3-none-any.whl
  Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ConnectTimeoutError(<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x00000279BF684048>, 'Connection to files.pythonhosted.org timed out. (connect timeout=15)')': /packages/a7/7c/24fb0511df653cf1a5d938d8f5d19802a88cef255706fdda242ff97e91b7/redis-3.5.3-py2.py3-none-any.whl
  Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ConnectTimeoutError(<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x00000279BF684908>, 'Connection to files.pythonhosted.org timed out. (connect timeout=15)')': /packages/a7/7c/24fb0511df653cf1a5d938d8f5d19802a88cef255706fdda242ff97e91b7/redis-3.5.3-py2.py3-none-any.whl
  Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ConnectTimeoutError(<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x00000279BF684688>, 'Connection to files.pythonhosted.org timed out. (connect timeout=15)')': /packages/a7/7c/24fb0511df653cf1a5d938d8f5d19802a88cef255706fdda242ff97e91b7/redis-3.5.3-py2.py3-none-any.whl
  Downloading https://files.pythonhosted.org/packages/a7/7c/24fb0511df653cf1a5d938d8f5d19802a88cef255706fdda242ff97e91b7/redis-3.5.3-py2.py3-none-any.whl (72kB)
    100% |████████████████████████████████| 81kB 746kB/s
Installing collected packages: redis
Successfully installed redis-3.5.3
You are using pip version 19.0.3, however version 21.2.4 is available.
You should consider upgrading via the 'python -m pip install --upgrade pip' command.

C:\hy\software>

这个安装好以后，我们就可以写程序连接到Redis了，请新建一个文本文件，名字不能是redis，扩展名为py，如1.py就很好，如果叫redis.py会出现奇怪的错误“module 'redis' has no attribute 'Redis'”这时也不要慌，把文件名改为别的就好了。

文件创建好后输入以下内容：

import redis
re = redis.Redis(host='127.0.0.1', port=6379,db=0, password='ufo')
re.set('dog','hashiqi')
print(re.get('pig'))

这四句话分别是引包、连接、设值、取值，几乎不用注释。

然后打开cmd窗口，进入文件所在目录，执行python tryRedis.py

C:\hy\py>python tryRedis.py
b'1234'

从输出可以看到，键pig的值1234取到了。

看看Redis控制台，dog的值也设置进去了：

C:\Redis-x64-3.2.100>redis-cli.exe -h 127.0.0.1 -p 6379
127.0.0.1:6379> auth ufo
OK
127.0.0.1:6379> get dog
"hashiqi"
127.0.0.1:6379>

以上步骤貌似不费劲，但也是我前进的一步，这一步是在以下网文的作者帮助下完成，在此向他们表示感谢：

1.https://www.runoob.com/w3cnote/python-redis-intro.html

2.https://www.cnblogs.com/igoodful/p/9747478.html

3.https://www.cnblogs.com/deliaries/p/11806164.html

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