code: def test_can_access_public_blobs():
      public_mt = "hail-az://azureopendatastorage/gnomad/release/3.1/mt/genomes/gnomad.genomes.v3.1.hgdp_1kg_subset.mt"
      assert hl.hadoop_exists(public_mt)
      with hl.hadoop_open(f"{public_mt}/README.txt") as readme:
          assert len(readme.read()) > 0
      mt = hl.read_matrix_table(public_mt)
      mt.describe()
  
file_path: hail/hail/python/test/hail/fs/test_worker_driver_fs.py
imports: import asyncio
  import os
  import pytest
  import hail
  from hailtop.utils import secret_alnum_string
  from hailtop.test_utils import skip_in_azure, run_if_azure
  from hailtop.aiocloud.aioazure import AzureAsyncFS
  from ..helpers import fails_local_backend, hl_stop_for_test, hl_init_for_test, test_timeout, resource
label_desc: Use image node_id 6 for calling a global function with example usage: test_can_access_public_blobs() without return types