imported os cause before I was dumb

app.py

@@ -2,6 +2,7 @@ import gradio as gr
 from huggingface_hub import InferenceClient
 from transformers import AutoModelForCausalLM, Trainer, TrainingArguments
 from datasets import load_dataset
+import os
 
 """
 For more information on `huggingface_hub` Inference API support, please check the docs: https://huggingface.co/docs/huggingface_hub/v0.22.2/en/guides/inference