code: def data_source(request):
      np_array, _ = create_data()
      return request.param if request.param != "np_array" else np_array
      clean_data()
  
file_path: AmpliGraph/tests/ampligraph/datasets/test_source_identifier.py
imports: import numpy
  import pytest
  import pandas
  from ampligraph.datasets import load_csv, chunks
  from ampligraph.datasets.source_identifier import DataSourceIdentifier
  import os
label_desc: Use image node_id 3 for calling a global function with example usage: data_source(request) and returns: unknown