added db clear var

app.py

@@ -23,6 +23,7 @@ def pdf_changes(pdf_doc):
     text_splitter = CharacterTextSplitter(chunk_size=1000, chunk_overlap=100)
     texts = text_splitter.split_documents(documents)
     embeddings = OpenAIEmbeddings()
+    global db
     db = Chroma.from_documents(texts, embeddings)
     retriever = db.as_retriever()
     global qa 
@@ -33,8 +34,9 @@ def pdf_changes(pdf_doc):
     return "Ready"
 
 def clear_data():
-    global qa
+    global qa, db
     qa = None
+    db = None
     return "Data cleared"
 
 def add_text(history, text):
@@ -62,14 +64,15 @@ def infer(question, history):
     return result["answer"]
 
 def auto_clear_data():
-    global qa, last_interaction_time
-    if time.time() - last_interaction_time > 600:
+    global qa, db, last_interaction_time
+    if time.time() - last_interaction_time > 1000:
         qa = None
-
+        db = None
+        
 def periodic_clear():
     while True:
         auto_clear_data()
-        time.sleep(60)
+        time.sleep(600)
 
 threading.Thread(target=periodic_clear).start()