code: def buck_test_data():
      data = np.asarray(
          [
              [1, 2, 3, 4, 5, 6, 7, 8],
              [1, 4, 6, 8, 10, 12, 14, 16],
              [0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4],
              [0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4],
              [3, 6, 9, 12, 15, 18, 21, 24],
              [4, 8, 9, 16, 20, 24, 28, 32],
          ]
      )
      data[0, 0] = np.nan
      return data
  
file_path: impyute/test/conftest.py
imports: import os
  import shutil
  import pytest
  import numpy
label_desc: Use image node_id 2 for calling a global function with example usage: buck_test_data() and returns: data