test_subprocess.py 文件源码

def test_zombie_fast_process_del(self):
        # Issue #12650: on Unix, if Popen.__del__() was called before the
        # process exited, it wouldn't be added to subprocess._active, and would
        # remain a zombie.
        # spawn a Popen, and delete its reference before it exits
        p = subprocess.Popen([sys.executable, "-c",
                              'import sys, time;'
                              'time.sleep(0.2)'],
                             stdout=subprocess.PIPE,
                             stderr=subprocess.PIPE)
        self.addCleanup(p.stdout.close)
        self.addCleanup(p.stderr.close)
        ident = id(p)
        pid = p.pid
        del p
        # check that p is in the active processes list
        self.assertIn(ident, [id(o) for o in subprocess._active])