#!/usr/bin/env python
     #
     # Copyright 2007 Doug Hellmann.
     #
     #
     #                         All Rights Reserved
     #
     # Permission to use, copy, modify, and distribute this software and
     # its documentation for any purpose and without fee is hereby
     # granted, provided that the above copyright notice appear in all
     # copies and that both that copyright notice and this permission
     # notice appear in supporting documentation, and that the name of Doug
     # Hellmann not be used in advertising or publicity pertaining to
     # distribution of the software without specific, written prior
     # permission.
     #
     # DOUG HELLMANN DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
     # INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN
     # NO EVENT SHALL DOUG HELLMANN BE LIABLE FOR ANY SPECIAL, INDIRECT OR
     # CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
     # OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
     # NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
     # CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
     #
     
     """Shallow copy example
     
     """
     
     __version__ = "$Id$"
     #end_pymotw_header
     
     import copy
     
     class MyClass:
         def __init__(self, name):
             self.name = name
         def __cmp__(self, other):
             return cmp(self.name, other.name)
     
     a = MyClass('a')
     l = [ a ]
     dup = copy.copy(l)
     
     print 'l  :', l
     print 'dup:', dup
     print 'dup is l:', (dup is l)
     print 'dup == l:', (dup == l)
     print 'dup[0] is l[0]:', (dup[0] is l[0])
     print 'dup[0] == l[0]:', (dup[0] == l[0])