How do you connect to Redis?

To connect to Redis, you can use a Redis client library to establish a connection with the Redis server.

In Python, you can use the redis-py library to connect to Redis. First, you need to install the redis-py library.

pip install redis

You can then use the following code to connect to the Redis server:

import redis

# 创建Redis连接
r = redis.Redis(host='localhost', port=6379, db=0)

# 执行Redis命令
r.set('key', 'value')
value = r.get('key')
print(value)

In the code above, the redis.Redis() function creates a Redis connection object by specifying the host, port, and db parameters to connect to the Redis server. The host parameter specifies the host name or IP address of the Redis server, the port parameter specifies the port of the Redis server, defaulting to 6379, and the db parameter specifies the connection database, defaulting to 0.

You can then use the r.set() method to set key-value pairs and the r.get() method to retrieve the value corresponding to the key. Finally, use the print statement to print the retrieved value.

The example above is for connecting to a local Redis server. To connect to a remote Redis server, simply change the host parameter to the hostname or IP address of the remote server.

Besides the redis-py library, there are also Redis client libraries in other languages that can be used to connect to Redis, such as Jedis library in Java, ioredis library in Node.js, etc. The specific usage methods can be found in the documentation of the corresponding libraries.