code: def _join(dirname, basename):
      # It is common if dirname or basename is empty
      if not dirname or not basename:
          return dirname or basename
      return os.path.join(dirname, basename)
  
imports: import contextlib
  import os
  import re
  import fnmatch
  import itertools
  import stat
  import sys
label_desc: Use image node_id 14 for calling a global function with example usage: _join(dirname, basename) and returns: os, unknown