Update app.py

app.py

@@ -21,6 +21,11 @@ import dotenv
 from dotenv import load_dotenv
 load_dotenv()
 
+# Ensure the API token is set 
+huggingfacehub_api_token = os.getenv('HUGGINGFACEHUB_API_TOKEN') 
+if not huggingfacehub_api_token: 
+  raise ValueError("Please set the HUGGINGFACEHUB_API_TOKEN environment variable.") 
+
 # %% ../drive/MyDrive/Codici/Python/Apps/Gradio_App/Langchain_apps/langchain_summarization_app.ipynb 5
 hub_llm = HuggingFaceHub(
     repo_id="facebook/bart-large-cnn", # facebook/bart-large-cnn or "google/flan-t5-base" or "google/pegasus-xsum"
@@ -32,6 +37,7 @@ hub_llm = HuggingFaceHub(
         "top_k": 50,  # Consider only the top k most likely tokens when generating
         "top_p": 0.95,  # Consider tokens with cumulative probability up to top_p
         "early_stopping": True, # Stops generation when a certain condition is met (e.g., end-of-sequence token)
+        "huggingfacehub_api_token": huggingfacehub_api_token
     }
 )