code: def nn_data():
      nndata = np.random.uniform(0, 1, size=(1000, 5))
      # Add some all zero graph_data for corner case test
      nndata = np.vstack([nndata, np.zeros((2, 5))])
      return nndata
  
file_path: pynndescent/pynndescent/tests/conftest.py
imports: import os
  import pytest
  import numpy
  from scipy import sparse
label_desc: Use image node_id 6 for calling a global function with example usage: nn_data() and returns: nndata