Update app.py

added temp file deletion to "restart conversation"

app.py

@@ -114,6 +114,10 @@ def clear():
     return [None, [], None]
 
 def updatePassword(txt):
+    while not qdelete.empty():
+        fname = qdelete.get()
+        if os.path.exists(fname):
+            os.remove(fname)
     return [txt.lower().strip(), "*********"]
 
 # def setModel(val):