code: def keybundle_from_local_file(filename, typ, usage):
      
      usage = harmonize_usage(usage)
  
      if typ.lower() == "jwks":
          kb = KeyBundle(source=filename, fileformat="jwks", keyusage=usage)
      elif typ.lower() == 'der':
          kb = KeyBundle(source=filename, fileformat="der", keyusage=usage)
      else:
          raise UnknownKeyType("Unsupported key type")
  
      return kb
docs: Create a KeyBundle based on the content in a local file
      
      :param filename: Name of the file 
      :param typ: Type of content
      :param usage: What the key should be used for
      :return: The created KeyBundle