from ebook_converter.ebooks import DRMError as _DRMError


__license__ = 'GPL v3'
__copyright__ = '2013, Kovid Goyal <kovid at kovidgoyal.net>'
__docformat__ = 'restructuredtext en'


class InvalidBook(ValueError):
    pass


class DRMError(_DRMError):

    def __init__(self):
        super(DRMError, self).__init__('This file is locked with DRM. It '
                                       'cannot be edited.')


class MalformedMarkup(ValueError):
    pass