Update app.py

app.py

@@ -99,9 +99,9 @@ def chat():
     #old_db = session.get('old_db', None) 
     #print(f"Selected DB: {CHROMA_PATH}")
     
-    if TEMP_PATH != None and TEMP_PATH != CHROMA_PATH:
+    if TEMP_PATH is not None and TEMP_PATH != CHROMA_PATH:
         session['history'] = []
-    else: TEMP_PATH=CHROMA_PATH
+    TEMP_PATH = CHROMA_PATH
     
     if request.method == 'POST':
         query_text = request.form['query_text']