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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 create_process(cmd, root_helper=None, addl_env=None, log_output=True):
 """Create a process object for the given command. The return value will be a tuple of the process object and the list of command arguments used to create it. """

    if root_helper:
        cmd = shlex.split(root_helper) + cmd
    cmd = map(str, cmd)

    log_output and LOG.info("Running command: %s", cmd)
    env = os.environ.copy()
    if addl_env:
        env.update(addl_env)

    obj = subprocess_popen(cmd, shell=False, stdin=subprocess.PIPE,
                           stdout=subprocess.PIPE, stderr=subprocess.PIPE,
                           env=env)
    return obj, cmd