LLM generated correct code but execution returned unexpected error message

[xiaohanwu001]

I'm doing text to sql and this is the tool I defined:

I initialized an agent with qwen2.5 and ran a simple query
agent = CodeAgent( tools=[db_query_tool], model=HfApiModel("Qwen/Qwen2.5-Coder-32B-Instruct"), ) agent.run("how many albums are in the Album table?")

The agent generated the correct code, but the execution of the code returned an error message:

I mean if we just take the code out and run it, it is supposed to execute without error and print out 347.
Because album_count is [(347,)], album_count[0] is (347,), and running album_count[0] should not give any error.
So why is the code not able to be executed by the agent?