杀死由另一个脚本调用的子进程启动的 python 脚本（Windows）

Question

I'm trying to integrate ESA'2 sen2cor python-script into my workflow. To do this I create a subprocess with which I call the "L2A_Process.bat" file, which in turn calls the "L2A_Process.py" script. I want to launch the sen2cor-script with a timeout since it gets stuck and freezes from time to time, so as to automatically re-launch it if it failed. To launch it and catch a timeout I successfully used the following script:

import os, subprocess
from signal import CTRL_BREAK_EVENT

timeout = 3600 #1hour
l1c_safe_path = "path/to/my/input/file.SAFE" #product that I want to process
command = ["L2A_process.bat", l1c_safe_path]
p = subprocess.Popen(command,shell=False, creationflags=subprocess.CREATE_NEW_PROCESS_GROUP)
try:    
    p.wait(timeout)
except subprocess.TimeoutExpired:    
    os.kill(p.pid, CTRL_BREAK_EVENT) 

This is as far as I got. It results in the sen2cor-script being paused giving the following output:

Terminate batch job (Y/N)

I'd like to know how I can properly terminate my subprocess "p" with all it own child-subprocesses (ie "L2A_Process.py").

Some observations:

• This script needs to run on Windows;

• I've tried to kill the subprocess without the creationflag I've used in the example above: this results in the subprocess being killed but the "L2A_Process.py" script deteaches an keeps running (which is the core of my problem);

• I cannot use a CTRL_C_EVENT since I want to re-launch the failed "L2A_Process.py" in a loop until it succeeds.

Answer 1

This code works for me to monitor Sen2cor status while converting L1C to L2A for Sentinel 2 data. The Sen2cor process is time and cpu consuming so be patient. It took half an hour to create L2A with DEM, DDV, etc. Hope it helps

from subprocess import Popen, PIPE 
import os

pathtoprodS1C = "path_to_L1C_product"   // safe file 
outdirS2A = "output_dir"                // where L2A files will be placed  
pathtoL2Process = "path_to_L2A_Process" //if not in path

pathtoGIPP = "path_to_your_GIPP/L2A_GIPP.xml"

procName = "./L2A_Process"

os.chdir(pathtoL2Process)
import shlex
pcall = "./{} {} --output_dir {} --tif --GIP_L2A {}".format(procName, 
                                                pathtoprodS1C, 
                                                pathtoprodS2A,
                                                pathtoGIPP)
args = shlex.split(pcall)
print(args)
try:
    p = Popen(args, stdout=PIPE)
    eut = p.stdout.readline()
    while eut:
        eut = p.stdout.readline()
        print(eut)
finally:
    print('Sen2Cor is Done')
    
exit()