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# PyEPL: exceptions.py
#
# Copyright (C) 2003-2005 Michael J. Kahana
# Authors: Ian Schleifer, Per Sederberg, Aaron Geller, Josh Jacobs
# URL: http://memory.psych.upenn.edu/programming/pyepl
#
# Distributed under the terms of the GNU Lesser General Public License
# (LGPL). See the license.txt that came with this file.
"""
This module defines some base exceptions for PyEPL.
"""
import warnings
class EPLException(Exception):
"""
Base exception class for PyEPL.
"""
def __init__(self, desc):
"""
Initialize exception with a description.
"""
self.desc = desc
def __str__(self):
"""
Get a string representation of this exception.
"""
return "EPL Exception: %s" % self.desc
class EPLError(EPLException):
"""
Base class for PyEPL errors (i.e. normal execution cannot
continue).
"""
def __str__(self):
"""
Get a string representation of this error.
"""
return "EPL Error: %s" % self.desc
def eplWarn(message, category = UserWarning, stackLevel = 1):
"""
Issue a warning. Execution continues normally.
"""
warnings.warn("EPL Warning: %s" % message, category, stackLevel + 1)
class EPLFatalError(EPLError):
"""
An error so serious that execution cannot continue at all.
"""
def __str__(self):
"""
Get a string representation of this error.
"""
return "EPL FATAL ERROR: %s" % self.desc
class BadFileExtension(EPLError):
"""
Error indicating that a filename extension was not understood.
"""
def __init__(self, ext):
"""
Get a string representation of this error.
"""
EPLError.__init__(self, "The file extension %s is not recognized in context." % ext);
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