coerce_exceptions.py

###############################################################################
#   SAGE: System for Algebra and Geometry Experimentation    
#       Copyright (C) 2009 Robert Bradshaw <[email protected]>
#  Distributed under the terms of the GNU General Public License (GPL)
#  The full text of the GPL is available at:
#                  http://www.gnu.org/licenses/
###############################################################################


class CoercionException(TypeError):
    """
    This is the baseclass of exceptions that the coercion model raises 
    when trying to discover coercions. We don't use standard Python 
    exceptions to avoid inadvertently catching and suppressing real errors. 
    
    Usually one raises this to indicate the attempted action isn't 
    implemented/appropriate, but if there are other things to try not
    to immediately abort to the user. 
    """
    pass