code: def valid_data_types():
      """Filter valid data types for those that work with plotting functions."""
      valid_data_types = tuple(
          filter(lambda x: x is not np.ndarray, VALID_DATA_TYPES)
      )
      return valid_data_types
  
imports: import re
  import numpy
  import pandas
  import pytest
  from sktime.datasets import load_airline
  from sktime.tests.test_switch import run_test_for_class
  from sktime.utils.plotting import plot_correlations, plot_lags, plot_series
  from sktime.utils.validation._dependencies import _check_soft_dependencies
  from sktime.utils.validation.series import VALID_DATA_TYPES
label_desc: Use image node_id 2 for calling a global function with example usage: valid_data_types() and returns: valid_data_types