code: def load_sidebar_bindings(python_input):
      
      bindings = KeyBindings()
  
      handle = bindings.add
      sidebar_visible = Condition(lambda: python_input.show_sidebar)
  
      @handle('up', filter=sidebar_visible)
      @handle('c-p', filter=sidebar_visible)
      @handle('k', filter=sidebar_visible)
      def _(event):
          " Go to previous option. "
          python_input.selected_option_index = (
              (python_input.selected_option_index - 1) % python_input.option_count)
  
      @handle('down', filter=sidebar_visible)
      @handle('c-n', filter=sidebar_visible)
      @handle('j', filter=sidebar_visible)
      def _(event):
          " Go to next option. "
          python_input.selected_option_index = (
              (python_input.selected_option_index + 1) % python_input.option_count)
  
      @handle('right', filter=sidebar_visible)
      @handle('l', filter=sidebar_visible)
      @handle(' ', filter=sidebar_visible)
      def _(event):
          " Select next value for current option. "
          option = python_input.selected_option
          option.activate_next()
  
      @handle('left', filter=sidebar_visible)
      @handle('h', filter=sidebar_visible)
      def _(event):
          " Select previous value for current option. "
          option = python_input.selected_option
          option.activate_previous()
  
      @handle('c-c', filter=sidebar_visible)
      @handle('c-d', filter=sidebar_visible)
      @handle('c-d', filter=sidebar_visible)
      @handle('enter', filter=sidebar_visible)
      @handle('escape', filter=sidebar_visible)
      def _(event):
          " Hide sidebar. "
          python_input.show_sidebar = False
          event.app.layout.focus_last()
  
      return bindings
docs: Load bindings for the navigation in the sidebar.