.. currentmodule:: pyfits.core

******************************
Exceptions and Utility Classes
******************************

Exceptions
==========

.. inheritance-diagram:: VerifyError
   :parts: 2

:class:`VerifyError`
--------------------

.. autoclass:: VerifyError
   :members:
   :undoc-members:
   :show-inheritance:

Utility Classes
===============

.. inheritance-diagram:: Delayed Undefined ErrorURLopener
   :parts: 2

:class:`Delayed`
----------------

.. autoclass:: Delayed
   :members:
   :undoc-members:
   :show-inheritance:

:class:`Undefined`
------------------

.. autoclass:: Undefined
   :members:
   :undoc-members:
   :show-inheritance:

:class:`ErrorURLopener`
-----------------------

.. autoclass:: ErrorURLopener
   :members:
   :undoc-members:
   :show-inheritance: