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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 thread_pool():
 """ Get the rendition threadpool """

        if not LocalImage._thread_pool:
            logger.info("Starting LocalImage threadpool")
            LocalImage._thread_pool = concurrent.futures.ThreadPoolExecutor(
                thread_name_prefix="Renderer")
        return LocalImage._thread_pool