from six import PY2 if PY2: from ctypes import py_object, pythonapi mappingproxy = pythonapi.PyDictProxy_New mappingproxy.argtypes = [py_object] mappingproxy.restype = py_object else: from types import MappingProxyType as mappingproxy unicode = type(u'') __all__ = [ 'mappingproxy', 'unicode', ]