Question

我正在使用Windows 8 x64系统

我正在编写一个代码，我在其中使用子进程来执行一个冗长的程序执行时我获取程序的输出并分析它的运行时间，特别是标准

我希望在符合条件后立即终止进程，我无法在程序中完成，所以我想从python终止子进程

我的代码看起来像这样

class myThread (threading.Thread):
    def __init__(self, threadI....
        ........
        .......

    def run(self):
        self.process= subprocess.Popen(cmd,stdout=subprocess.PIPE,stderr=subprocess.STDOUT)
        for line in iter(p.stdout.readline, b''):
            .........................
            ......Run-time Analysis........
            .........................
            if (criteria_met):
                  self.stop()
            .........................
            ........................
    def stop(self):
    if self.process is not None:
        self.process.terminate()
        self.process = None

但我得到这样的错误

Exception in thread Thread-1:
Traceback (most recent call last):
  File "C:\Python27\lib\threading.py", line 551, in __bootstrap_inner
    self.run()
  File "VB_Extraction.py", line 57, in run
    self.process.kill()
  File "C:\Python27\lib\subprocess.py", line 1019, in terminate
    _subprocess.TerminateProcess(self._handle, 1)
WindowsError: [Error 5] Access is denied

这个问题的原因是什么？如何在完成前终止流程？

Answer 1

调用.poll()检查进程是否仍在运行：

if self.process is not None and self.process.poll() is None: # still running
    self.process.terminate() # or .kill() if it doesn't terminate it
    self.process.communicate() # close pipes, wait for completion
    self.process = None

在python2.7中终止子进程

1 个答案: