code: def test_jottings():
      # example
      fname = os.path.join(test_data_path, "parabola.mat")
      read_workspace_vars(fname)
  
imports: import os.path
  import io
  from scipy.io.matlab._mio5 import MatFile5Reader
label_desc: Use image node_id 3 for calling a global function with example usage: test_jottings() without return types