code: def transpose_list_of_lists(list_of_lists):
      """Transposes a list of lists."""
      return [list(i) for i in zip(*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 6 for calling a global function with example usage: transpose_list_of_lists(list_of_lists) and returns: unknown