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# This file implements a case insensitive dictionary on top of the
# UserDict standard python class
#
# Copyright (c) 2001-2005, Red Hat Inc.
# All rights reserved.
#
# $Id: UserDictCase.py 191145 2010-03-01 10:21:24Z msuchy $
import string
from types import StringType
from UserDict import UserDict
# A dictionary with case insensitive keys
class UserDictCase(UserDict):
def __init__(self, data = None):
self.kcase = {}
UserDict.__init__(self, data)
# some methods used to make the class work as a dictionary
def __setitem__(self, key, value):
lkey = key
if isinstance(key, StringType):
lkey = string.lower(key)
self.data[lkey] = value
self.kcase[lkey] = key
def __getitem__(self, key):
if isinstance(key, StringType):
key = string.lower(key)
if not self.data.has_key(key):
return None
return self.data[key]
def __delitem__(self, key):
if isinstance(key, StringType):
key = string.lower(key)
del self.data[key]
del self.kcase[key]
get = __getitem__
def keys(self):
return self.kcase.values()
def items(self):
return self.get_hash().items()
def has_key(self, key):
if isinstance(key, StringType):
key = string.lower(key)
return self.data.has_key(key)
def clear(self):
self.data.clear()
self.kcase.clear()
# return this data as a real hash
def get_hash(self):
return reduce(lambda a, (ik, v), hc=self.kcase:
a.update({ hc[ik] : v}) or a, self.data.items(), {})
# return the data for marshalling
def __getstate__(self):
return self.get_hash()
# we need a setstate because of the __getstate__ presence screws up deepcopy
def __setstate__(self, state):
self.__init__(state)
# get a dictionary out of this instance ({}.update doesn't get instances)
def dict(self):
return self.get_hash()
def update(self, dict):
for (k, v) in dict.items():
lk = k
if isinstance(k, StringType):
lk = string.lower(k)
self.data[lk] = v
self.kcase[lk] = k
# Expose an iterator. This would normally fail if there is no iter()
# function defined - but __iter__ will never be called on python 1.5.2
def __iter__(self):
return iter(self.data)
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