redis如何做mysql缓存

import redis
import pymysql

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

# 连接MySQL
mysql_conn = pymysql.connect(host='localhost', user='user', password='password', db='database')
mysql_cursor = mysql_conn.cursor()

def get_data(key):
    # 尝试从Redis缓存中获取数据
    data = redis_client.get(key)
    if data is not None:
        return data.decode('utf-8')
    
    # 如果缓存中没有数据，则从MySQL中获取
    mysql_cursor.execute("SELECT data FROM table WHERE key = %s", (key,))
    result = mysql_cursor.fetchone()
    if result is not None:
        data = result[0]
        
        # 将数据存入Redis缓存
        redis_client.setex(key, 3600, data)  # 设置TTL为3600秒
        
        return data
    
    return None

# 使用示例
data = get_data('some_key')
print(data)