subprocess.wait(超时=15) 不工作

Question

代码：

import os
import subprocess


execs = ['C:\Users\XYZ\PycharmProjects\Task1\dist\Multiof2.exe', # --> Child 1
         'C:\Users\XYZ\PycharmProjects\Task1\dist\Multiof5.exe', # --> Child 2
         'C:\Users\XYZ\PycharmProjects\Task1\dist\Multiof10.exe',...] # --> Child 3 and more
print('Parent Process id : ', os.getpid())
process = [subprocess.Popen(exe) for exe in execs]
for proc in process:
    try:
        proc.wait(timeout=15)
        print('Child Process id : ', proc.pid)
        if proc.returncode == 0:
            print(proc.pid, 'Exited')

    except subprocess.TimeoutExpired:
        proc.terminate()
        print('Child Process with pid',proc.pid ,'is killed')

某些子进程的执行时间将超过 15 秒。所以，我必须杀死超时的进程。但是 proc.wait(timeout=15) 并没有引发异常，而是执行了该过程。

我也试过 [subprocess.Popen(exe, timeout=15) for exe in execs] 但得到了错误：

TypeError: __init__() got an unexpected keyword argument 'timeout'

Answer 1

您不是在并行等待进程 - 您是给每个进程连续的 15 秒时间来完成他们的工作。

您可能需要这样的东西，让所有这些并行时间最多为 15 秒。

import os
import subprocess
import time


execs = [
    "C:\Users\XYZ\PycharmProjects\Task1\dist\Multiof2.exe",
    "C:\Users\XYZ\PycharmProjects\Task1\dist\Multiof5.exe",
    "C:\Users\XYZ\PycharmProjects\Task1\dist\Multiof10.exe",
]
print("Parent Process id : ", os.getpid())
process = [subprocess.Popen(exe) for exe in execs]
start_time = time.time()
while True:
    elapsed_time = time.time() - start_time
    any_alive = False
    for proc in process:
        ret = proc.poll()
        if ret is None:  # still alive
            if elapsed_time >= 15:
                print("Killing:", proc.pid)
                proc.terminate()
            any_alive = True
    if not any_alive:
        break
    time.sleep(1)

subprocess.wait(超时=15) 不工作

subprocess.wait(timeout=15) is not working

python

subprocess

exe

python-3.x