code: def fake_calibrate_thermal(data, *args, **kwargs):
      """Fake calibration."""
      del args, kwargs
      return data * 35.43 + 3
  
imports: import os
  import unittest
  from contextlib import suppress
  from tempfile import NamedTemporaryFile
  from unittest import mock
  import numpy
  import xarray
  from satpy.readers.hrpt import HRPTFile, dtype
  from satpy.tests.reader_tests.test_avhrr_l1b_gaclac import PygacPatcher
  from satpy.tests.utils import make_dataid
label_desc: Use image node_id 2 for calling a global function with example usage: fake_calibrate_thermal(data) and returns: unknown