#!/usr/bin/python2.4

import types
class CaselessDictionary(dict):
  def __setitem__(self, key, value):
    if isinstance(key, types.StringTypes):
      key = key.lower()
    dict.__setitem__(self, key.lower(), value)

  def __delitem__(self, key):
    if isinstance(key, types.StringTypes):
      key = key.lower()
    dict.__delitem__(self, key.lower())

  def __getitem__(self, key):
    if isinstance(key, types.StringTypes):
      key = key.lower()
    return dict.__getitem__(self, key.lower())

import code
code.interact(local=CaselessDictionary())