-
- def __len__(self):
- """len(:class:`Filenames`) returns the number of contained files
-
- .. note::
-
- This method exhausts the iterator object, so you will not be able to
- iterate over them again.
- """
- if not self._files_p:
- raise NotInitializedError()
-
- i = 0
- while self._valid(self._files_p):
- self._move_to_next(self._files_p)
- i += 1
- self._files_p = None
- return i