def iteritems(self): return ttftree.value_iterator(self.var.get())
def __iter__(self): for k, _ in ttftree.value_iterator(self.var.get()): yield k
def itervalues(self): for _, v in ttftree.value_iterator(self.var.get()): yield v
def __iter__(self): return ttftree.value_iterator(self.var.get())