code: def help_text(self, name, text, text_kind='plain', trim_pfx=0):
          
  
          if trim_pfx > 0:
              # caller wants to trim some space off the front
              # of each line
              text = toolbox.trim_prefix(text, trim_pfx)
  
          if text_kind == 'rst':
              # try to convert RST to HTML using docutils
              try:
                  overrides = {'input_encoding': 'ascii',
                               'output_encoding': 'utf-8'}
                  text_html = publish_string(text, writer_name='html',
                                             settings_overrides=overrides)
                  # docutils produces 'bytes' output, but webkit needs
                  # a utf-8 string
                  text = text_html.decode('utf-8')
                  text_kind = 'html'
  
              except Exception as e:
                  self.logger.error("Error converting help text to HTML: %s" % (
                      str(e)))
                  # revert to showing RST as plain text
  
          else:
              raise ValueError(
                  "I don't know how to display text of kind '%s'" % (text_kind))
  
          if text_kind == 'html':
              self.help(text=text, text_kind='html')
  
          else:
              self.show_help_text(name, text)
docs: Provide help text for the user.
  
          This method will convert the text as necessary with docutils and
          display it in the WBrowser plugin, if available.  If the plugin is
          not available and the text is type 'rst' then the text will be
          displayed in a plain text widget.
  
          Parameters
          ----------
          name : str
              Category of help to show.
  
          text : str
              The text to show.  Should be plain, HTML or RST text
  
          text_kind : str (optional)
              One of 'plain', 'html', 'rst'.  Default is 'plain'.
  
          trim_pfx : int (optional)
              Number of spaces to trim off the beginning of each line of text.