Problem with Pylint's handling on __all__

Binary package hint: pylint

The following example code illustrates two surprises with Pylint's handling of __all__.
1. Including an nonexistant member should raise an error.
2. republishing an imported member in __all__ should not raise a warning that the import was unused.

"""Test Pylint's use of __all__.

* NonExistant is not defined in this module, and it is listed in
  __all__. An error is expected.

* This module imports path and republished it in __all__. No errors
  are expected.
"""
from os import path

__all__ = [
  'Dummy',
  'NonExistant',
  'path',]

class Dummy:
  """A class defined in this module."""