asyncio异步 loop.run_in_executor操作同步方法变成异步操作

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import time import asyncio from concurrent.futures import ThreadPoolExecutor     def long_blocking_function():     print(time.time())     time.sleep(2)     return True     async def run():     loop = asyncio.get_event_loop()     # 新建线程池     pool = ThreadPoolExecutor()     # 任务列表     tasks = [loop.run_in_executor(pool, long_blocking_function),              loop.run_in_executor(pool, long_blocking_function)]     # 等待所有任务结束并返回     return await asyncio.gather(*tasks)       if __name__ == '__main__':     # 获取新的事件循环     loop = asyncio.new_event_loop()     # 设置当前事件循环     asyncio.set_event_loop(loop)     now = time.time()     loop.run_until_complete(run())     print(time.time() - now)