Harrison/redis (#2588)

Co-authored-by: Tyler Hutcherson <tyler.hutcherson@redis.com>

langchain/vectorstores/redis.py

@@ -27,11 +27,13 @@ REDIS_REQUIRED_MODULES = [
 
 def _check_redis_module_exist(client: RedisType, modules: List[dict]) -> None:
     """Check if the correct Redis modules are installed."""
-    installed_modules = client.info().get("modules", [])
-    installed_modules = {module["name"]: module for module in installed_modules}
+    installed_modules = client.module_list()
+    installed_modules = {
+        module[b"name"].decode("utf-8"): module for module in installed_modules
+    }
     for module in modules:
         if module["name"] not in installed_modules or int(
-            installed_modules[module["name"]]["ver"]
+            installed_modules[module["name"]][b"ver"]
         ) < int(module["ver"]):
             error_message = (
                 "You must add the RediSearch (>= 2.4) module from Redis Stack. "