class_docstr: PAR/REC header
class_docstr_tok: ["PAR\/REC","header"]
docstr: Returns the slice orientation label.
  
  Returns
  -------
  orientation : {'transverse', 'sagittal', 'coronal'}
docstr_tok: ["Returns","the","slice","orientation","label",".","Returns","--","--","--","-","orientation",":","{","'transverse","'",",","'sagittal","'",",","'coronal","'","}"]
code: def get_slice_orientation(self):
      """Returns the slice orientation label.
  
      Returns
      -------
      orientation : {'transverse', 'sagittal', 'coronal'}
      """
      lab = self._get_unique_image_prop("slice orientation")
      return slice_orientation_codes.label[lab]
  
imports: import re
  import warnings
  from collections import OrderedDict
  from copy import deepcopy
  from io import StringIO
  from locale import getpreferredencoding
  import numpy
  from .affines import apply_affine, dot_reduce, from_matvec
  from .eulerangles import euler2mat
  from .fileslice import fileslice, strided_scalar
  from .nifti1 import unit_codes
  from .openers import ImageOpener
  from .spatialimages import SpatialHeader, SpatialImage
  from .volumeutils import Recoder, array_from_file
label_desc: Use image node_id 20 for calling the PARRECHeader obj's underlying member method code with example usage: obj.get_slice_orientation() and returns: slice_orientation_codes