code: def redis_key(self, name):
      return f"{self.category}_{name}"
  
imports: import os
  import time
  from abc import ABC
  from pathlib import Path
  import hashlib
  import typing
  import pandas
  import walrus
  from mindsdb.utilities.config import Config
  from mindsdb.utilities.json_encoder import CustomJSONEncoder
  from mindsdb.interfaces.storage.fs import FileLock
  from mindsdb.utilities.context import context
label_desc: Use image node_id 3 for calling the RedisCache obj's underlying member method code with example usage: obj.redis_key(name) and returns: self, str, name