code: def _string_hash(s):
      """String hash (djb2) with consistency between py2/py3 and persistency between runs (unlike `hash`)."""
      h = 5381
      for c in s:
          h = h * 33 + ord(c)
      return h
  
file_path: turicreate/src/python/turicreate/toolkits/object_detector/util/_visualization.py
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import absolute_import
  import turicreate
  import numpy
  from turicreate.toolkits._internal_utils import _numeric_param_check_range
  from turicreate.toolkits._main import ToolkitError
label_desc: Use image node_id 1 for calling a global function with example usage: _string_hash(s) and returns: h