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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def celery_run(data_id, runtime_dir, argv):
 """Run process executor. :param data_id: The id of the :class:`~resolwe.flow.models.Data` object to be processed. :param runtime_dir: The directory from which to run the executor. :param argv: The argument vector used to run the executor. :param verbosity: The logging verbosity level. """

    subprocess.Popen(
        argv,
        cwd=runtime_dir,
        stdin=subprocess.DEVNULL
    ).wait()