code: def load(self, *args):
          
          def _preiter(first, iterable):
              yield first
              for item in iterable:
                  yield item
  
          loaded = set()
          for key in iter(item for ilist in iter(ilist if isinstance(ilist, (tuple, list)) else [ilist] for ilist in args)
                          for item in ilist):
              if os.path.isfile(key):
                  _key, keys = PGPKey.from_file(key)
  
              else:
                  _key, keys = PGPKey.from_blob(key)
  
              for ik in _preiter(_key, keys.values()):
                  self._add_key(ik)
                  loaded |= {ik.fingerprint} | {isk.fingerprint for isk in ik.subkeys.values()}
  
          return list(loaded)
docs: Load all keys provided into this keyring object.
  
          :param \*args: Each arg in ``args`` can be any of the formats supported by :py:meth:`PGPKey.from_path` and
                        :py:meth:`PGPKey.from_blob`, or a ``list`` or ``tuple`` of these.
          :type \*args: ``list``, ``tuple``, ``str``, ``unicode``, ``bytes``, ``bytearray``
          :returns: a ``set`` containing the unique fingerprints of all of the keys that were loaded during this operation.