code: def _colorize(output):
      
      if not pygments:
          return output
      # Available styles
      # ['monokai', 'manni', 'rrt', 'perldoc', 'borland', 'colorful', 'default',
      # 'murphy', 'vs', 'trac', 'tango', 'fruity', 'autumn', 'bw', 'emacs',
      # 'vim', 'pastie', 'friendly', 'native']
      return pygments.highlight(output,
              pygments.lexers.PythonLexer(),
              pygments.formatters.Terminal256Formatter(style='monokai'))
docs: Return `output` colorized with Pygments, if available.