code: def theme_get():
      
      from .theme_gray import theme_gray
      _theme = get_option('current_theme')
      if isinstance(_theme, type):
          _theme = _theme()
      return _theme or theme_gray()
docs: Return the default theme
  
      The default theme is the one set (using :func:`theme_set`) by
      the user. If none has been set, then :class:`theme_gray` is
      the default.