code: def is_list_of_sparse(data):
      return (
          type(data) == list
          and type(data[0]) == scipy.sparse.csr.csr_matrix
      )
  
imports: import os
  import re
  import shutil
  import numpy
  import scipy
  import cntk
  import pytest
  from .onnx_verify_helper import verify_results_with_onnxruntime, get_onnx_test_runner_callscript
label_desc: Use image node_id 1 for calling a global function with example usage: is_list_of_sparse(data) and returns: unknown