code: def save_layout(vehname):
      '''save window layout'''
      global display_size
      global window_list
      global vehiclename
      if display_size is None:
          print("No layouts to save")
          return
      vehiclename = vehname
      fname = layout_filename(False)
      if fname is None:
          print("No file to save layout to")
          return
      layout = {}
      try:
          # include previous layout, so we retain layouts for widows not
          # currently displayed
          layout = pickle.load(open(fname,"rb"))
      except Exception:
          pass
      count = 0
      for name in window_list:
          layout[name] = window_list[name].layout
          count += 1
      pickle.dump(layout, open(fname,"wb"))
      print("Saved layout for %u windows" % countf save_layout(vehname):
      '''save window layout'''
      global display_size
      global window_list
      global vehiclename
      if display_size is None:
          print("No layouts to save")
          return
      vehiclename = vehname
      fname = layout_filename(False)
      if fname is None:
          print("No file to save layout to")
          return
      layout = {}
      try:
          # include previous layout, so we retain layouts for widows not
          # currently displayed
          layout = pickle.load(open(fname,"rb"))
      except Exception:
          pass
      count = 0
      for name in window_list:
          layout[name] = window_list[name].layout
          count += 1
      pickle.dump(layout, open(fname,"wb"))
      print("Saved layout for %u windows" % count)
docs: save window layout