code: def _join_path(main_path, path):
      if not path:
          return main_path
      return os.path.join(main_path, _norm_path(path))
  
imports: import errno
  import functools
  import json
  import os
  import sys
  import threading
  import six
label_desc: Use image node_id 11 for calling a global function with example usage: _join_path(main_path, path) and returns: os, main_path