code: def cling_wrap(package_name, dir_name, **kw):
      
      resource = Requirement.parse(package_name)
      return Cling(resource_filename(resource, dir_name), **kw)
docs: Return a Cling that serves from the given package and dir_name.
  
      This uses pkg_resources.resource_filename which is not the
      recommended way, since it extracts the files.
  
      I think this works fine unless you have some _very_ serious
      requirements for static content, in which case you probably
      shouldn't be serving it through a WSGI app, IMHO. YMMV.