class ctype_csr_mat(object):
        def __init__(self, arr_in):
                self.csr = spsp.csr_matrix(arr_in)
                c_type = c_float
                dtype = np.single

                self.csr.data.astype(dtype)

                self.c_data = self.csr.data.ctypes.data_as(POINTER(c_type)) #*self.csr.data.size

        def show(self, indent=4):
                sp = ' '*indent
                to_print = [ self.c_data[0:self.csr.data.size]]
                name = ['c_data']
                for i in range(1):
                        print sp + name[i] + ': ' + str(to_print[i])
def test():
        # Make Test Data
        Ao = [[1,0,0],
             [1,1,1],
             [0,0,1]]
        AA = np.array(Ao, dtype=np.single) # save the original matrix
        A = ctype_csr_mat(Ao)
        A.show()

test()

c_data:
[1.401298464324817e-45,
 0.0,
 1.401298464324817e-45,
 0.0,
 1.401298464324817e-45]