Update app.py

app.py

@@ -130,7 +130,7 @@ def talk(prompt, history):
     # write data to file
         with open('file.txt', 'a') as data:
             data.write(historylog)
-        data.open('r')
+        data = open('file.txt', 'r')
         data.seek(0)
     # Read the contents of the file to display it.
         print("History log printed:")