Update app.py

app.py

@@ -1,18 +1,19 @@
 import os
-import sys
-
-# --- HUGGING FACE CHROMADB FIX ---
-# Forces the use of pysqlite3-binary to avoid DB crashes
-try:
-    __import__('pysqlite3')
-    sys.modules['sqlite3'] = sys.modules.pop('pysqlite3')
-except ImportError:
-    # If this fails, we continue, but it might crash later if the system sqlite is old
-    pass
-# ---------------------------------
-
 import gradio as gr
+from langchain_community.document_loaders import PyPDFLoader
 from langchain_openai import ChatOpenAI, OpenAIEmbeddings
+
+# --- DEBUG & SETUP ---
+api_key = os.getenv("OPENAI_API_KEY")
+
+# Check if Key is missing and warn the logs
+if not api_key:
+    print("⚠️ CRITICAL ERROR: OPENAI_API_KEY is missing from Secrets.")
+    # Fallback: Try to grab it if user named it differently
+    api_key = os.getenv("OPENAI_KEY") or os.getenv("key")
+
+# Force set the variable for LangChain
+os.environ["OPENAI_API_KEY"] = str(api_key)
 from langchain_community.document_loaders import PyPDFLoader
 from langchain_text_splitters import RecursiveCharacterTextSplitter
 from langchain_chroma import Chroma