code: def get_last_modified_timestamp(path, ignore=None):
      
      ignore = ignore or []
      if not isinstance(path, six.string_types):
          return
      ignore_str = ''
      if ignore:
          assert isinstance(ignore, (tuple, list))
          ignore_str = ' '.join("! -name '%s'" % _ for _ in ignore)
      cmd = 'find "'+path+'" ' + ignore_str + ' -type f -printf "%T@ %p\n" | sort -n | tail -1 | cut -f 1 -d " "'
           #'find '+path+' -type f -printf "%T@ %p\n" | sort -n | tail -1 | cut -d " " -f1
      ret = subprocess.check_output(cmd, shell=True)
      # Note, we round now to avoid rounding errors later on where some formatters
      # use different decimal contexts.
      try:
          ret = round(float(ret), 2)
      except ValueError:
          return
      return ret
docs: Recursively finds the most recent timestamp in the given directory.