553         return [(k, self[k]) for k in self._list]

   553         return [(k, self[k]) for k in self._list]

   554     def __delitem__(self, key):

   554     def __delitem__(self, key):

   555         dict.__delitem__(self, key)

   555         dict.__delitem__(self, key)

   556         self._list.remove(key)

   556         self._list.remove(key)

   557     def pop(self, key, *args, **kwargs):

   557     def pop(self, key, *args, **kwargs):

   559         try:

   558         try:

   560             self._list.remove(key)

   559             self._list.remove(key)

   561         except ValueError:

   560         except ValueError:

   562             pass

   561             pass

   563     def keys(self):

   563     def keys(self):

   564         return self._list[:]

   564         return self._list[:]

   565     def iterkeys(self):

   565     def iterkeys(self):

   566         return self._list.__iter__()

   566         return self._list.__iter__()

   567     def iteritems(self):

   567     def iteritems(self):