3. Using a messagebox

def save_data():
   try:
      fileD = open("orders.txt","a")
      fileD.write("Destination:\n")
      fileD.write("%s\n" %destination.get())
      fileD.write("Description:\n")
      fileD.write("%s\n" %description.get())
      fileD.write("Address:\n")
      fileD.write("%s\n" %address.get("1.0",END))
      destination.set(None)
      description.delete(0,END)
      address.delete("1.0",END)
   except Exception as exception:
      app.title('File writing error: %s' %exception)

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