code: def az_dsn_fs(az_fs):
      if should_skip(AZ_DSN_URI):
          yield [None] * NUM_ATR_FS
          return
  
      _, read, write, mkdirs, join, fs_internal = az_fs
      _, container_name, account = fs_internal
  
      def path_to_dsn(*args):
          return f"{AZ_URI}://{account}.blob.core.windows.net/{container_name}/{posixpath.join(ROOT_PREFIX, *args)}"
  
      yield path_to_dsn, read, write, mkdirs, join, fs_internal
  
imports: import functools
  import os
  import posixpath
  import random
  import socket
  import sys
  import time
  from urllib.parse import urlparse
  import pytest
  import tensorflow
  import tensorflow_io
label_desc: Use image node_id 6 for calling a global function with example usage: az_dsn_fs(az_fs) and returns: AZ_URI, str, account, str, container_name, str, posixpath