code: def get_idxs_from_list_of_lists(list_of_lists, idx):
      """Returns a list of objects corresponding to index idx from a list of lists."""
      return [elem[idx] for elem in list_of_lists]
  
imports: from __future__ import print_function
  from __future__ import division
  import numpy
  from scipy.sparse import dok_matrix
  from scipy.linalg import solve_triangular
label_desc: Use image node_id 5 for calling a global function with example usage: get_idxs_from_list_of_lists(list_of_lists, idx) and returns: unknown