old_contents: from django.conf import settings
  
  from jinja2 import Markup
  from jingo import register, env
  
  
  try:
      from build import BUILD_ID_CSS, BUILD_ID_JS, BUILD_ID_IMG
  except ImportError:
      BUILD_ID_CSS = BUILD_ID_JS = 'dev'
  
  def _build_html(items, wrapping):
      """
      Wrap `items` in wrapping.
      """
      return Markup("\n".join((wrapping % (settings.MEDIA_URL + item)
                              for item in items)))
  
  
  @register.function
  def js(bundle, debug=settings.TEMPLATE_DEBUG):
      """
      If we are in debug mode, just output a single script tag for each js file.
      If we are not in debug mode, return a script that points at bundle-min.js.
      """
      if debug:
          items = settings.MINIFY_BUNDLES['js'][bundle]
      else:
          items = ("js/%s-min.js?build=%s" % (bundle, BUILD_ID_JS,),)
  
      return _build_html(items, """<script src="%s"></script>""")
  
  
  @register.function
  def css(bundle, media="screen,projection,tv", debug=settings.TEMPLATE_DEBUG):
      """
      If we are in debug mode, just output a single script tag for each css file.
      If we are not in debug mode, return a script that points at bundle-min.css.
      """
      if debug:
          items = settings.MINIFY_BUNDLES['css'][bundle]
      else:
          items = ("css/%s-min.css?build=%s" % (bundle, BUILD_ID_CSS,),)
  
      return _build_html(items,
              """<link rel="stylesheet" media="%s" href="%%s" />""" % media)
  
  def build_ids(request):
      """A context processor for injecting the css/js build ids."""
      return {'BUILD_ID_CSS': BUILD_ID_CSS, 'BUILD_ID_JS': BUILD_ID_JS,
              'BUILD_ID_IMG': BUILD_ID_IMG}
  
new_contents: from django.conf import settings
  
  from jinja2 import Markup
  from jingo import register, env
  
  
  try:
      from build import BUILD_ID_CSS, BUILD_ID_JS, BUILD_ID_IMG
  except ImportError:
      BUILD_ID_CSS = BUILD_ID_JS = BUILD_ID_IMG = 'dev'
  
  def _build_html(items, wrapping):
      """
      Wrap `items` in wrapping.
      """
      return Markup("\n".join((wrapping % (settings.MEDIA_URL + item)
                              for item in items)))
  
  
  @register.function
  def js(bundle, debug=settings.TEMPLATE_DEBUG):
      """
      If we are in debug mode, just output a single script tag for each js file.
      If we are not in debug mode, return a script that points at bundle-min.js.
      """
      if debug:
          items = settings.MINIFY_BUNDLES['js'][bundle]
      else:
          items = ("js/%s-min.js?build=%s" % (bundle, BUILD_ID_JS,),)
  
      return _build_html(items, """<script src="%s"></script>""")
  
  
  @register.function
  def css(bundle, media="screen,projection,tv", debug=settings.TEMPLATE_DEBUG):
      """
      If we are in debug mode, just output a single script tag for each css file.
      If we are not in debug mode, return a script that points at bundle-min.css.
      """
      if debug:
          items = settings.MINIFY_BUNDLES['css'][bundle]
      else:
          items = ("css/%s-min.css?build=%s" % (bundle, BUILD_ID_CSS,),)
  
      return _build_html(items,
              """<link rel="stylesheet" media="%s" href="%%s" />""" % media)
  
  def build_ids(request):
      """A context processor for injecting the css/js build ids."""
      return {'BUILD_ID_CSS': BUILD_ID_CSS, 'BUILD_ID_JS': BUILD_ID_JS,
              'BUILD_ID_IMG': BUILD_ID_IMG}
  
subject: fix the import fallback