code: def get_sequence_axis_index(output_variable):
      for i in range(0, len(output_variable.dynamic_axes)):
          axis = output_variable.dynamic_axes[i]
          if axis.is_sequence_axis:
              return i
      for i in range(0, len(output_variable.shape)):
          if output_variable.shape[i] == CNTK_FREEDIM_AXIS_DENOTATION:
              return i + len(output_variable.dynamic_axes)
      return -1
  
imports: import os
  import re
  import shutil
  import numpy
  import scipy
  import cntk
  import pytest
  from .onnx_verify_helper import verify_results_with_onnxruntime, get_onnx_test_runner_callscript
label_desc: Use image node_id 4 for calling a global function with example usage: get_sequence_axis_index(output_variable) and returns: unknown, i, unknown