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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 check_rest(args):
    '''check if restful server is running'''
    nni_config = Config(get_config_filename(args))
    rest_port = nni_config.get_config('restServerPort')
    running, _ = check_rest_server_quick(rest_port)
    if not running:
        print_normal('Restful server is running...')
    else:
        print_normal('Restful server is not running...')