code: def test_run_shell():
      from speechbrain.utils.superpowers import run_shell
  
      out, err, code = run_shell("echo -n hello")
      assert out.decode() == "hello"
      assert err.decode() == ""
      assert code == 0
  
      with pytest.raises(OSError):
          run_shell("false")
  
      # This last run is just to check that a bytes
      # sequence that is returned in an incompatible encoding (not UTF-8)
      # does not cause an error .
      output, _, _ = run_shell("echo -n pöö | iconv -t LATIN1")
      assert output.decode("latin1") == "pöö"
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_run_shell() without return types