AttributeError: module 'os' has no attribute 'setsid'

[Coderx7]

Under windows,trying to run the example : Auto-tuning a convolutional network for x86 CPU this error occurs.
the error occurs in the last cell :

def tune_and_evaluate(tuning_opt):
    # extract workloads from relay program
    print("Extract tasks...")
    mod, params, data_shape, out_shape = get_network(model_name, batch_size)
    tasks = autotvm.task.extract_from_program(mod["main"], target=target,
                                              params=params, ops=(relay.op.nn.conv2d,))

    # run tuning tasks
    print("Tuning...")
    tune_kernels(tasks, **tuning_opt)
    tune_graph(mod["main"], data_shape, log_file, graph_opt_sch_file)

    # compile kernels with graph-level best records
    with autotvm.apply_graph_best(graph_opt_sch_file):
        print("Compile...")
        with relay.build_config(opt_level=3):
            graph, lib, params = relay.build_module.build(
                mod, target=target, params=params)

        # upload parameters to device
        ctx = tvm.cpu()
        data_tvm = tvm.nd.array((np.random.uniform(size=data_shape)).astype(dtype))
        module = runtime.create(graph, lib, ctx)
        module.set_input(input_name, data_tvm)
        module.set_input(**params)

        # evaluate
        print("Evaluate inference time cost...")
        ftimer = module.module.time_evaluator("run", ctx, number=100, repeat=3)
        prof_res = np.array(ftimer().results) * 1000  # convert to millisecond
        print("Mean inference time (std dev): %.2f ms (%.2f ms)" %
              (np.mean(prof_res), np.std(prof_res)))

# We do not run the tuning in our webpage server since it takes too long.
# Uncomment the following line to run it by yourself.

# tune_and_evaluate(tuning_option)

Error :

Extract tasks...
ANTLR runtime and generated code versions disagree: 4.8!=4.7.2
ANTLR runtime and generated code versions disagree: 4.8!=4.7.2
Tuning...
[Task  1/12]  Current/Best:    0.00/   0.00 GFLOPS | Progress: (0/252) | 0.00 sTraceback (most recent call last):

  File "d:\Codes\tvm_testbed\tune_relay_x86.py", line 225, in <module>
    tune_and_evaluate(tuning_option)

  File "d:\Codes\tvm_testbed\tune_relay_x86.py", line 198, in tune_and_evaluate
    tune_kernels(tasks, **tuning_opt)

  File "d:\Codes\tvm_testbed\tune_relay_x86.py", line 170, in tune_kernels
    autotvm.callback.log_to_file(log_filename)])

  File "C:\Users\User\Anaconda3\lib\site-packages\tvm-0.7.dev0-py3.7-win-amd64.egg\tvm\autotvm\tuner\tuner.py", line 108, in tune
    measure_batch = create_measure_batch(self.task, measure_option)

  File "C:\Users\User\Anaconda3\lib\site-packages\tvm-0.7.dev0-py3.7-win-amd64.egg\tvm\autotvm\measure\measure.py", line 252, in create_measure_batch
    attach_objects = runner.set_task(task)

  File "C:\Users\User\Anaconda3\lib\site-packages\tvm-0.7.dev0-py3.7-win-amd64.egg\tvm\autotvm\measure\measure_methods.py", line 337, in set_task
    tracker_addr=(tracker.host, tracker.port))

  File "C:\Users\User\Anaconda3\lib\site-packages\tvm-0.7.dev0-py3.7-win-amd64.egg\tvm\rpc\server.py", line 369, in __init__
    self.proc = subprocess.Popen(cmd, preexec_fn=os.setsid)

AttributeError: module 'os' has no attribute 'setsid'

[tqchen]

Thanks @Coderx7