code: def _replace_symlink(filename, newtarget):
      tmpfn = "%s.new" % filename
      os.symlink(newtarget, tmpfn)
      os.rename(tmpfn, filename)
  
imports: from __future__ import with_statement
  import logging
  import optparse
  import os
  import os.path
  import re
  import shutil
  import subprocess
  import sys
  import itertools
label_desc: Use image node_id 9 for calling a global function with example usage: _replace_symlink(filename, newtarget) without return types