#!/usr/bin/env python
     # encoding: utf-8
     #
     # Copyright (c) 2008 Doug Hellmann All rights reserved.
     #
     """
     $Id$
     """
     #end_pymotw_header
     import contextlib
     
     @contextlib.contextmanager
     def make_context():
         print '  entering'
         try:
             yield {}
         except RuntimeError, err:
             print '  ERROR:', err
         finally:
             print '  exiting'
     
     print 'Normal:'
     with make_context() as value:
         print '  inside with statement:', value
     
     print
     print 'Handled error:'
     with make_context() as value:
         raise RuntimeError('showing example of handling an error')
     
     print
     print 'Unhandled error:'
     with make_context() as value:
         raise ValueError('this exception is not handled')