code: def sparse_diff(ind1, data1, ind2, data2):
      return sparse_sum(ind1, data1, ind2, -data2)
  
imports: from __future__ import print_function
  import locale
  import numba
  import numpy
  from umap.utils import norm
label_desc: Use image node_id 5 for calling a global function with example usage: sparse_diff(ind1, data1, ind2, data2) and returns: sparse_sum