#!/usr/bin/env python
# IndexingError.py
#   Copyright (C) 2006 CCLRC, Graeme Winter
#
#   This code is distributed under the BSD license, a copy of which is
#   included in the root directory of this package.
#
# An exception to be raised when an indexing program decides that there
# is a specific problem with indexing - this should be recoverable.

from exceptions import Exception

class IndexingError(Exception):
    '''An exception to be raised when a lattice is not right.'''

    def __init__(self, value):
        self.parameter = value

    def __str__(self):
        return repr(self.parameter)

if __name__ == '__main__':
    raise IndexingError, 'mosaic estimation failed'