#!/usr/bin/env python
     # encoding: utf-8
     #
     # Copyright (c) 2010 Doug Hellmann.  All rights reserved.
     #
     """Implementing the context manager API by hand.
     """
     #end_pymotw_header
     
     class WithinContext(object):
     
         def __init__(self, context):
             print 'WithinContext.__init__(%s)' % context
             
         def do_something(self):
             print 'WithinContext.do_something()'
     
         def __del__(self):
             print 'WithinContext.__del__'
             
     
     class Context(object):
     
         def __init__(self):
             print 'Context.__init__()'
     
         def __enter__(self):
             print 'Context.__enter__()'
             return WithinContext(self)
     
         def __exit__(self, exc_type, exc_val, exc_tb):
             print 'Context.__exit__()'
         
     with Context() as c:
         c.do_something()