code: def landmark_uncertainty_tuples_path(download_path):
      path_ = download_path
      os.makedirs(path_, exist_ok=True)
  
      valid_path = os.path.join(
          path_,
          "Uncertainty_tuples/U-NET/SA/uncertainty_pairs_valid_t0",
      )
      test_path = os.path.join(
          path_, "Uncertainty_tuples/U-NET/SA/uncertainty_pairs_test_t0"
      )
  
      dl_path = os.path.join(path_, "Uncertainty_tuples")
      return valid_path, test_path, dl_path
  
imports: import os
  import pytest
  from scipy.io import loadmat
label_desc: Use image node_id 4 for calling a global function with example usage: landmark_uncertainty_tuples_path(download_path) and returns: valid_path,  test_path,  dl_path