code: def on_helpButton(self, event, page=None):
          
          # for use on the command line:
          path = find_pmag_dir.get_pmag_dir()
          # for use with pyinstaller
          #path = self.main_frame.resource_dir
          help_page = os.path.join(path, 'dialogs', 'help_files', page)
          # if using with py2app, the directory structure is flat,
          # so check to see where the resource actually is
          if not os.path.exists(help_page):
              help_page = os.path.join(path, 'help_files', page)
          html_frame = pw.HtmlFrame(self, page=help_page)
          html_frame.Show()
docs: shows html help page