code: def test_pixdim_log_checks(self):
      # pixdim positive
      HC = self.header_class
      hdr = HC()
      hdr["pixdim"][1] = -2  # severity 35
      fhdr, message, raiser = self.log_chk(hdr, 35)
      assert fhdr["pixdim"][1] == 2
      assert (
          message
          == "pixdim[1,2,3] should be positive; setting to abs of pixdim values"
      )
      pytest.raises(*raiser)
      hdr = HC()
      hdr["pixdim"][1] = 0  # severity 30
      fhdr, message, raiser = self.log_chk(hdr, 30)
      assert fhdr["pixdim"][1] == 1
      assert message == PIXDIM0_MSG
      pytest.raises(*raiser)
      # both
      hdr = HC()
      hdr["pixdim"][1] = 0  # severity 30
      hdr["pixdim"][2] = -2  # severity 35
      fhdr, message, raiser = self.log_chk(hdr, 35)
      assert fhdr["pixdim"][1] == 1
      assert fhdr["pixdim"][2] == 2
      assert message == (
          "pixdim[1,2,3] should be non-zero and pixdim[1,2,3] should be "
          "positive; setting 0 dims to 1 and setting to abs of pixdim values"
      )
      pytest.raises(*raiser)
  
imports: import itertools
  import logging
  import os
  import pickle
  import re
  from io import BytesIO, StringIO
  import numpy
  import pytest
  from numpy.testing import assert_array_almost_equal, assert_array_equal
  from ..None import imageglobals
  from ..analyze import AnalyzeHeader, AnalyzeImage
  from ..arraywriters import WriterError
  from ..casting import sctypes_aliases
  from ..nifti1 import Nifti1Header
  from ..optpkg import optional_package
  from ..spatialimages import HeaderDataError, HeaderTypeError, supported_np_types
  from ..testing import assert_dt_equal, bytesio_filemap, bytesio_round_trip, data_path, suppress_warnings
  from ..tmpdirs import InTemporaryDirectory
  from .None import test_spatialimages
  from .None import test_wrapstruct
label_desc: Use image node_id 10 for calling the TestAnalyzeHeader obj's underlying member method code with example usage: obj.test_pixdim_log_checks() without return types