1from __future__ import absolute_import 2import sys 3 4from future.utils import PY2, PY26 5__future_module__ = True 6 7from collections import * 8 9if PY2: 10 from UserDict import UserDict 11 from UserList import UserList 12 from UserString import UserString 13 14if PY26: 15 from future.backports.misc import OrderedDict, Counter 16 17if sys.version_info < (3, 3): 18 from future.backports.misc import ChainMap, _count_elements 19