code: def test_operator_export():
      """Assert that a TPOT operator can export properly with a callable function as a parameter."""
      assert (
          list(TPOTSelectPercentile.arg_types)
          == TPOTSelectPercentile_args
      )
      export_string = TPOTSelectPercentile.export(5)
      assert (
          export_string
          == "SelectPercentile(score_func=f_classif, percentile=5)"
      )
  
imports: from tqdm import tqdm
  import numpy
  from os import remove, path
  from tpot import TPOTClassifier, TPOTRegressor
  from tpot.export_utils import export_pipeline, generate_import_code, _indent, generate_pipeline_code, get_by_name, set_param_recursive
  from tpot.operator_utils import TPOTOperatorClassFactory
  from tpot.config.classifier import classifier_config_dict
  from sklearn.datasets import load_digits
  from sklearn.model_selection import train_test_split
  from deap import creator
  from nose.tools import assert_raises, assert_equal, nottest
label_desc: Use image node_id 16 for calling a global function with example usage: test_operator_export() without return types