code: def diff_tool(threshold=None):
      return get_limited_precision_dsv_diff_tool(threshold, True)
  
imports: import os
  import pytest
  import re
  import yatest.common
  from lib import data_file, get_limited_precision_dsv_diff_tool
label_desc: Use image node_id 1 for calling a global function with example usage: diff_tool(threshold) and returns: get_limited_precision_dsv_diff_tool