code: def test_fixed_length_lists():
      assert table.fixed_length_lists(
          [
              [1, 2, 3],
              [],
              [1],
              [1, 2],
          ]
      ) == [
          [1, 2, 3],
          [None, None, None],
          [1, None, None],
          [1, 2, None],
      ]
  
file_path: sklearn-evaluation/tests/test_table.py
imports: from unittest.mock import Mock
  import pytest
  import numpy
  from sklearn_evaluation import table
label_desc: Use image node_id 7 for calling a global function with example usage: test_fixed_length_lists() without return types