from UserDict import UserDict
class odict(UserDict):
def __init__(self, dict = None):
self._keys = []
UserDict.__init__(self, dict)
def __delitem__(self, key):
UserDict.__delitem__(self, key)
self._keys.remove(key)
def __setitem__(self, key, item):
UserDict.__setitem__(self, key, item)
if key not in self._keys: self._keys.append(key)
def clear(self):
UserDict.clear(self)
self._keys = []
def copy(self):
dict = UserDict.copy(self)
dict._keys = self._keys[:]
return dict
def items(self):
return zip(self._keys, self.values())
def keys(self):
return self._keys
def popitem(self):
try:
key = self._keys[-1]
except IndexError:
raise KeyError('dictionary is empty')
val = self[key]
del self[key]
return (key, val)
def setdefault(self, key, failobj = None):
UserDict.setdefault(self, key, failobj)
if key not in self._keys: self._keys.append(key)
def update(self, dict):
UserDict.update(self, dict)
for key in dict.keys():
if key not in self._keys: self._keys.append(key)
def values(self):
return map(self.get, self._keys)
