This blocking function will start a process and wait until the new process exits before moving on. The documentation recommends using run() for all cases that it can handle. For edge cases where you need more control, the Popen class can be used. Popen is the underlying class for the ...
执行shell命令时,推荐使用p=subprocess.Popen,可以实时获取执行进度,通过readline或者readlines或者p.wait函数皆可以阻塞shell命令 如果将subprocess.Popen放在thread中,不仅需要停止线程,还需要停止进程,即线程设置为守护,进程调用p.kill结束,两个都调用才能结束当前执行的任务 如果p=subprocess.Popen中设置了shell=True,则会...
11#通过communicate方法,等待这些子进程完成其I/O工作并终结12forprocinprocs:13proc.communicate()14 end =time()15print('Finished in %.3f seconds'% (end-start))16 17 >>> 18 Finishedin0.117seconds#假如这些子进程逐个运行,而不是平行运行,那么总的延迟时间就会达到1秒钟,#而不会像本例这样,只用了0....
# 使用 subprocess 执行命令 process = subprocess.Popen(execute_command, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE) # 等待较长时间,例如 30 秒 timeout_seconds = 30 start_time = time.time() while time.time() - start_time < timeout_seconds: if process.poll() is not None:...
obj=subprocess.Popen(["ipconfig","-all"],stdin=subprocess.PIPE,stdout=subprocess.PIPE) (out,err)=obj.communicate() ''' Interact with process: Send data to stdin. Read data from stdout and stderr, until end-of-file is reached. Wait for ...
loop.run_until_complete(asyncio.wait(tasks)) loop.close()#程序总共等待2simport asyncio async def my_task(seconds): print("This task is take {} seconds to cpmplete".format(seconds)) await asyncio.sleep(seconds) return "task finished" ...
# Run this with a pool of 5 agents having a chunksize of 3 until finished agents = 5 chunksize = 3 with Pool(processes=agents) as pool: result = pool.map(square, dataset, chunksize) # Output the result print ('Result: ' + str(result)) ...
Returns a subprocess.Popen object. test.support.script_helper.kill_python(p) Run the given subprocess.Popen process until completion and return stdout. test.support.script_helper.make_script(script_dir, script_basename, source, omit_suffix=False) Create script containing source in path script_dir ...
Subprocesses Process类是子进程的高级封装,用来与子进程通信并监控其执行。该类跟subprocess.Popen 类似,区别是:没有pool()方法;communicate()和wait()方法没有timeout参数。 class asyncio.subprocess.Process #类属性 stdin,stdout,stderr,pid,returncode #等待子进程结束并返回returncode coroutine wait() #optional...
def _wait_output(popen, is_slow): """Returns `True` if we can get output of the command in the `settings.wait_command` time. Command will be killed if it wasn't finished in the time. :type popen: Popen :rtype: bool """ proc = Process(popen.pid) try: proc.wait(settings.wait...