code: def test_hdf5_compression():
      with backends.TempHDFBackend(compression="gzip") as b:
          run_sampler(b, blobs=True)
          # re-open and read
          b.get_chain()
          b.get_blobs()
          b.get_log_prob()
          b.accepted
  
file_path: emcee/src/emcee/tests/unit/test_backends.py
imports: import os
  from itertools import product
  from os.path import join
  import numpy
  import pytest
  from emcee import EnsembleSampler, State, backends
  from emcee.backends.hdf import does_hdf5_support_longdouble
label_desc: Use image node_id 13 for calling a global function with example usage: test_hdf5_compression() without return types