code: def test_persyst_standard():
      """Test standard operations."""
      _test_raw_reader(read_raw_persyst, fname=fname_lay)
  
file_path: mne-python/mne/io/persyst/tests/test_persyst.py
imports: import os
  import shutil
  import numpy
  import pytest
  from numpy.testing import assert_array_equal
  from mne.datasets.testing import data_path, requires_testing_data
  from mne.io import read_raw_persyst
  from mne.io.tests.test_raw import _test_raw_reader
label_desc: Use image node_id 6 for calling a global function with example usage: test_persyst_standard() without return types