code: def test_io_c_annot():
      """Test I/O of MNE-C -annot.fif files."""
      raw = read_raw_fif(fname_raw)
      sfreq, first_samp = raw.info["sfreq"], raw.first_samp
      events = read_events(fname_c_annot)
      events_2, event_id = read_events(
          fname_c_annot, return_event_id=True
      )
      assert_array_equal(events_2, events)
      expected = np.arange(2, 5) * sfreq + first_samp
      assert_allclose(
          events[:, 0], expected, atol=3
      )  # clicking accuracy (samp)
      expected = {"Two sec": 1001, "Three and four sec": 1002}
      assert event_id == expected
  
imports: import os
  from pathlib import Path
  import numpy
  import pytest
  from numpy.testing import assert_allclose, assert_array_almost_equal, assert_array_equal, assert_equal
  from mne import Annotations, Epochs, compute_raw_covariance, count_events, create_info, find_events, find_stim_steps, make_fixed_length_events, pick_channels, pick_events, read_events, read_evokeds, write_events
  from mne.datasets import testing
  from mne.event import AcqParserFIF, define_target_events, match_event_names, merge_events, shift_time_events
  from mne.io import RawArray, read_raw_fif
label_desc: Use image node_id 5 for calling a global function with example usage: test_io_c_annot() without return types