Update app.py

app.py

@@ -12,13 +12,13 @@ from huggingface_hub import login
 
 # Load environment variables
 load_dotenv()
-login(token=os.environ.get('HF_KEY'))
+login(token=os.getenv('HF_KEY'))
 
 # Initialize Embedding Model
 embedding_model = HuggingFaceEmbeddings(model_name="sentence-transformers/all-MiniLM-L6-v2")
 
 # Pinecone Retriever
-api_key = os.environ.get('PINCE_CONE_LIGHT')
+api_key = os.getenv('PINCE_CONE_LIGHT')
 if api_key is None:
     raise ValueError("Pinecone API key missing.")
 else:
@@ -36,7 +36,7 @@ llm_options = {
 def load_llm(name, model_name):
     """Loads the selected LLM model only when needed."""
     if name == "OpenAI":
-        openai_api_key = os.environ.get('OPEN_AI_KEY')
+        openai_api_key = os.getenv('OPEN_AI_KEY')
         return ChatOpenAI(model='gpt-4o-mini', openai_api_key=openai_api_key)
     
     if "Phi" in name or "DeepSeek" in name: