On Saturday, December 14, 2013, Dinesh Vadhia wrote:
Long-time scipy sparse user and looking at pysparse wrt improving CSR performance.  But, need CSR slicing which isn't mentioned except that CSR/SSS matrices cannot be manipulated after creation.  Thanks.

Currently, there is no way to slice a CSR matrix, though that's probably not too hard to implement. I'm not sure any of us has the time to do that right now but we do welcome contributions.