pandas/tests/sparse/test_array.py:568: in _check_roundtrip
    unpickled = tm.round_trip_pickle(obj)
pandas/util/testing.py:108: in round_trip_pickle
    pd.to_pickle(obj, path)
pandas/io/pickle.py:45: in to_pickle
    pkl.dump(obj, f, protocol=protocol)
../pypy/lib_pypy/cPickle.py:124: in dump
    Pickler(file, protocol).dump(obj)
../pypy/lib-python/2.7/pickle.py:224: in dump
    self.save(obj)
../pypy/lib-python/2.7/pickle.py:331: in save
    self.save_reduce(obj=obj, *rv)
../pypy/lib-python/2.7/pickle.py:427: in save_reduce
    save(state)
../pypy/lib-python/2.7/pickle.py:286: in save
    f(self, obj) # Call unbound method with explicit self
../pypy/lib-python/2.7/pickle.py:556: in save_tuple
    save(element)
../pypy/lib-python/2.7/pickle.py:286: in save
    f(self, obj) # Call unbound method with explicit self
../pypy/lib-python/2.7/pickle.py:556: in save_tuple
    save(element)
../pypy/lib-python/2.7/pickle.py:331: in save
    self.save_reduce(obj=obj, *rv)
../pypy/lib-python/2.7/pickle.py:402: in save_reduce
    save(func)
../pypy/lib-python/2.7/pickle.py:286: in save
    f(self, obj) # Call unbound method with explicit self
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <cPickle.Pickler object at 0x000000000ac71670>
obj = <type 'pandas._libs.sparse.IntIndex'>, name = '_libs.sparse.IntIndex'
pack = <built-in function pack>

    def save_global(self, obj, name=None, pack=struct.pack):
        write = self.write
        memo = self.memo
    
        if name is None:
            name = obj.__name__
    
        module = getattr(obj, "__module__", None)
        if module is None:
            module = whichmodule(obj, name)
    
        try:
            __import__(module)
            mod = sys.modules[module]
            klass = getattr(mod, name)
        except (ImportError, KeyError, AttributeError):
            raise PicklingError(
                "Can't pickle %r: it's not found as %s.%s" %
>               (obj, module, name))
E           PicklingError: Can't pickle <type 'pandas._libs.sparse.IntIndex'>: it's not found as pandas._libs.sparse.IntIndex

../pypy/lib-python/2.7/pickle.py:800: PicklingError
_________________________ TestSparseSeries.test_pickle _______________