) # Wait a second to let the port initialize time.sleep(1) 1. 2. 3. 4. 5. 6. 7. 8. 9. 关闭串口:在关闭串口的时候可以采用如下指令,就完成了对打开的端口进行关闭 serial_port.close() 1. 发送数据:利用串口最主要的过程就是对数据的发送和接收功能,发送数据
page.wait_for_selector("#uv", state="hidden")print("元素已经隐藏") page.wait_for_timeout(1000)#点击显示按钮page.locator("//html/body/form/input[5]").click() loc_msg= page.wait_for_selector("#uv", state="visible")print("元素已经显示")#获取元素文本print(loc_msg.inner_text()) p...
weeks (int) – number of weeks to wait days (int) – number of days to wait hours (int) – number of hours to wait minutes (int) – number of minutes to wait seconds (int) – number of seconds to wait start_date (datetime|str) – starting point for the interval calculation end_d...
数据可视化：matplotlib、seaborn、bokeh、pyecharts 数据报表：dash 以python操作excel为例，使用xlwings生成...
# Wait a second to let the port initialize time.sleep(1) try: # Send a simple header serial_port.write("UART Demonstration Program\r\n".encode()) serial_port.write("NVIDIA Jetson Nano Developer Kit\r\n".encode()) while True:
()) # Wait for 1 second await asyncio.sleep(1) task.cancel() try: await task except asyncio.CancelledError: print("main(): cancel_me is cancelled now") asyncio.run(main()) # Expected output: # # cancel_me(): before sleep # cancel_me(): cancel sleep # cancel_me(): after sleep...
在只有用户级线程的系统内,CPU调度还是以进程为单位,处于运行状态的进程中的多个线程,由用户程序控制线程的轮换运行;在有内核支持线程的系统内,CPU调度则以线程为单位,由OS的线程调度程序负责线程的调度。 用户级线程的程序实体是运行在用户态下的程序,而内核支持线程的程序实体则是可以运行在任何状态下的程序。
(directory,link)finally:self.queue.task_done()defmain():ts=time()client_id=os.getenv('IMGUR_CLIENT_ID')ifnot client_id:raiseException("Couldn't find IMGUR_CLIENT_ID environment variable!")download_dir=setup_download_dir()links=get_links(client_id)# Create a queue to communicatewiththe ...
second=5, minute=30, hour=2, args=['hello','world'] )# 每 10 秒运行一次scheduler.add_job( job1, trigger='cron', second='*/10')# 每天 1:00,2:00,3:00 运行scheduler.add_job( job1, trigger='cron', hour='1-3')# 在 6,7,8,11,12 月的第三个周五 的 1:00,2:00,3:00 ...
>>> import datetime>>> datetime.datetime.now() # ➊datetime.datetime(2019, 2, 27, 11, 10, 49, 55, 53) # ➋>>> dt = datetime.datetime(2019, 10, 21, 16, 29, 0) # ➌>>> dt.year, dt.month, dt.day # ➍(2019, 10, 21)>>> dt.hour, dt.minute, dt.second # ➎...