python - PyQt错误 “QProcess: Destroyed while process is still running”

Question

当我尝试运行以下 PyQt 代码来运行进程和 tmux 时，遇到错误 QProcess: Destroyed while process is still running。 如何修复此问题？

#!/usr/bin/env python
#-*- coding:utf-8 -*-

import sys
from PyQt4.QtCore import *
from PyQt4.QtGui import *

class embeddedTerminal(QWidget):

    def __init__(self):
        QWidget.__init__(self)
        self._processes = []
        self.resize(800, 600)
        self.terminal = QWidget(self)
        layout = QVBoxLayout(self)
        layout.addWidget(self.terminal)
        self._start_process(
            'xterm',
            ['-into', str(self.terminal.winId()),
             '-e', 'tmux', 'new', '-s', 'my_session']
        )
        button = QPushButton('list files')
        layout.addWidget(button)
        button.clicked.connect(self._list_files)

    def _start_process(self, prog, args):
        child = QProcess()
        self._processes.append(child)
        child.start(prog, args)

    def _list_files(self):
        self._start_process(
            'tmux', ['send-keys', '-t', 'my_session:0', 'ls', 'Enter']
        )

if __name__ == "__main__":
    app = QApplication(sys.argv)
    main = embeddedTerminal()
    main.show()

Answer 1

当应用程序关闭且进程尚未完成时，您通常会收到错误QProcess: Destroyed while process is still running。

在您当前的代码中，您的应用程序一启动就结束，因为您没有调用 app.exec_()。你应该这样做:

if __name__ == "__main__":
    app = QApplication(sys.argv)
    main = embeddedTerminal()
    main.show()
    sys.exit(app.exec_())

现在，它工作正常，但是当您关闭应用程序时，您仍然会收到错误消息。您需要覆盖关闭事件才能正确结束该过程。如果您将 child 替换为 self.child:

def closeEvent(self,event):
    self.child.terminate()
    self.child.waitForFinished()
    event.accept()