code: def update_entry_line(self, key=None):
          
  
          if key is None:
              key = self.actions.cursor
  
          cell_code = self.GetTable().GetValue(*key)
  
          post_command_event(self, self.EntryLineMsg, text=cell_code)
docs: Updates the entry line
  
          Parameters
          ----------
          key: 3-tuple of Integer, defaults to current cell
          \tCell to which code the entry line is updated