Move an existing element to the end (or beginning if last is false). Raise KeyError if the element does not exist.
>>> d = OrderedDict.fromkeys('abcde') >>> d.move_to_end('b') >>> ''.join(d) 'acdeb' >>> d.move_to_end('b', last=False) >>> ''.join(d) 'bacde'
collections/OrderedDict.move_to_end
OrderedDict.move_to_end