TypeError: index must be a pair of integers or slices

[ghost]

when I run nosetests -v sknn.tests, I got the error :TypeError: index must be a pair of integers or slices。How to solve this problem??? thank you very much!

ERROR: test_Predict64 (sknn.tests.test_types.TestScipySparseMatrix)

Traceback (most recent call last):
File "/Users/lihui/Documents/ML/scikit-neuralnetwork/sknn/tests/test_types.py", line 69, in test_Predict64
yp = self.nn._predict(X)
File "/Users/lihui/Documents/ML/scikit-neuralnetwork/sknn/mlp.py", line 262, in _predict
return self._backend._predict_impl(X)
File "/Users/lihui/Documents/ML/scikit-neuralnetwork/sknn/backend/lasagne/mlp.py", line 273, in _predict_impl
for Xb, _, _, idx in self._iterate_data(self.batch_size, X, y, shuffle=False):
File "/Users/lihui/Documents/ML/scikit-neuralnetwork/sknn/backend/lasagne/mlp.py", line 308, in _iterate_data
Xb, yb, wb = cast(X, excerpt), cast(y, excerpt), cast(w, excerpt)
File "/Users/lihui/Documents/ML/scikit-neuralnetwork/sknn/backend/lasagne/mlp.py", line 293, in cast
array = array[indices]
File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/scipy/sparse/dok.py", line 140, in getitem
raise TypeError('index must be a pair of integers or slices')
TypeError: index must be a pair of integers or slices