Hi, I think you're overcomplicating things when looking up Django's PID, the object returned by Popen already provides you that:
http://docs.python.org/library/subprocess.html#subprocess.Popen.pid Cheers, João On Thu, Sep 6, 2012 at 6:18 PM, Zak <[email protected]> wrote: > To see my full solution, look at the code below. Here it is described in > English: > > Use the Windows command 'tasklist' to get a list of all running > processes. Unfortunately, several processes are named simply > 'python.exe', and I could not find a way to figure out which one > corresponded to manage.py. If you kill the wrong 'python.exe' process, a > process may essentially kill itself. If the process kills itself before > it kills manage.py, then manage.py will not be killed at all. > > To solve this problem, I ran 'tasklist' several times and kept track of > when new processes appeared and which PID they had. It turns out that > three 'python.exe' processes are created, and you need to kill the third > one. > > I eventually kill the process using 'taskkill /F /pid %s' % (pid_to_kill). > > Here is the code, simplified and merged into a single file: > > import re > import subprocess > > pyPat = re.compile("(?m)^python\.exe\s+(?P<pid>\d+)") > # pyPat matches if "python.exe" occurs at the start of a new line (not in > # the middle), followed by one or more spaces, followed by one or more > # digits. The digits are stored in the 'pid' group of the match object. > > def get_python_pids(): > tasklist = subprocess.check_output(["tasklist"]) > pids = [] > for mtch in pyPat.finditer(tasklist): > pids.append(mtch.group('pid')) > return pids > > > import sys > import subprocess > from PySide.QtCore import * > from PySide.QtGui import * > from PySide.QtWebKit import * > > > # Create a Qt application > app = QApplication(sys.argv) > # Create a browser window and show it > browser = QWebView(None) > browser.load(QUrl("http://127.0.0.1:8000/";)) > browser.show() > > # pids = pm.get_python_pids() > # print "PID list 1:" > # print pids > ## Assuming no other Python things are running, > ## this prints a list of one PID, e.g. ['1'] > > # Start the Django server > manage_path = local_settings.root_dir + 'manage.py' > server = subprocess.Popen(["python", manage_path, "runserver"]) > > pids_1 = pm.get_python_pids() > # print "PID list 2:" > # print pids_1 > ## Prints a list of two PIDs, e.g. ['1', '2'] > > # Enter Qt application main loop > app.exec_() > > # If execution reaches this point, then the GUI window was closed > > # To kill the Django server, we must first figure out what > # its Windows PID is > > pids_2 = pm.get_python_pids() > # print "PID list 3:" > # print pids_2 > ## Prints a list of three PIDs, e.g. ['1', '2', '3'] > ## The proper process to kill is whichever one is new in pids_2. That is to > ## say, we should kill the process which is listed in pids_2 but is not > ## present in pids_1. In this example, it would be PID '3'. > > # max_kill is the maximum number of processes named 'python.exe' to kill > max_kill = 1 > for pid in pids_2: > if pid in pids_1: > continue > else: > subprocess.call(["taskkill", "/F", "/pid", pid]) > max_kill -= 1 > if max_kill == 0: > break > > # Now exit Python entirely > sys.exit() > > Zak F. > _______________________________________________ > PySide mailing list > [email protected] > http://lists.qt-project.org/mailman/listinfo/pyside >
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