code: def wrap_traceback(traceback):
      
      if email().format == 'html':
          try:
              from pygments import highlight
              from pygments.lexers import PythonTracebackLexer
              from pygments.formatters import HtmlFormatter
              with_pygments = True
          except ImportError:
              with_pygments = False
  
          if with_pygments:
              formatter = HtmlFormatter(noclasses=True)
              wrapped = highlight(traceback, PythonTracebackLexer(), formatter)
          else:
              wrapped = '<pre>%s</pre>' % traceback
      else:
          wrapped = traceback
  
      return wrapped
docs: For internal use only (until further notice)