code: def _get_repo_file_url(namespace, filename):
      
      return '{base_url}{namespace}/{filename}'.format(base_url=_get_repo_url(),
                                                       namespace=namespace,
                                                       filename=filename)
docs: Return the URL for hosted file in Gluon repository.
  
      Parameters
      ----------
      namespace : str
          Namespace of the file.
      filename : str
          Name of the file