ImportError: No module named scipy.sparse

Traceback (most recent call last):
  File "./faster_rcnn/train_net.py", line 23, in 
    from lib.fast_rcnn.train import get_training_roidb, train_net
  File "./faster_rcnn/../lib/__init__.py", line 1, in 
    import fast_rcnn
  File "./faster_rcnn/../lib/fast_rcnn/__init__.py", line 9, in 
    from . import train
  File "./faster_rcnn/../lib/fast_rcnn/train.py", line 18, in 
    from ..gt_data_layer import roidb as gdl_roidb
  File "./faster_rcnn/../lib/gt_data_layer/__init__.py", line 7, in 
    import roidb
  File "./faster_rcnn/../lib/gt_data_layer/roidb.py", line 11, in 
    import scipy.sparse
ImportError: No module named scipy.sparse

解决方法：

先执行

sudo yum install python-scipy

再执行

sudo pip install scipy