在 GUI Close 上终止所有 QThreads

Question

我有一个 PyQT gui，它有一个 gui 线程，还有 24 个 "tester threads." 它们工作正常，但当我关闭 gui 时似乎仍然无法正常工作。如何优雅地关闭线程以避免 python 崩溃？

#!/usr/bin/python
# Standard Lib
from datetime import datetime
import logging
import os
import random
import sys
import time
# Third Party
from PyQt4 import QtGui, QtCore
# Local Kung Fu
stuff


class SSITesterThread(QtCore.QThread):
    # vars for updating gui using signals
    updateText = QtCore.pyqtSignal(str)
    updateColor = QtCore.pyqtSignal(str)
    updateSN = QtCore.pyqtSignal(str)
    def __init__(self, thread_number, port, path, parent=None):
        super(SSITesterThread, self).__init__(parent)
        self.delay = random.random()
    def run(self):
        self.ssitester()
    def ssitester(self):
        # stuff



class SSITestSuiteGUI(QtGui.QMainWindow):
    def __init__(self, parent=None):
        self._threads = []
        QtGui.QWidget.__init__(self, parent)
        # Init class from template and paths
        self.launch_tester_threads()

    def init_gui_nodes(self, com_ports_list):
        for num, port, in zip(range(1, 25), range(0, 24)):
            label = getattr(self.ui, 'com_{}'.format(num))
            label.setText("COM Port: {}".format(com_ports_list[port]["COM"]))

    def launch_tester_threads(self):
        logging.info("Spinning up threads...")
        for num, com_port_chunk in zip(range(1, 25), self.com_ports_list):
            tester_thread = SSITesterThread(thread_number=num, port=com_port_chunk["COM"], path=self.vc_test_path)
            # get a reference to the associated textbox somehow...
            status_box = getattr(self.ui, 'status_{}'.format(num))
            tester_thread.updateText.connect(status_box.setText)
            status_box = getattr(self.ui, 'status_{}'.format(num))
            tester_thread.updateColor.connect(status_box.setStyleSheet)
            sn_label = getattr(self.ui, 'sn_{}'.format(num))
            tester_thread.updateSN.connect(sn_label.setText)
            sn_label.setText("S/N: None")
            tester_thread.start()
            self._threads.append(tester_thread)
        logging.info("Ready for tests.")


if __name__ == "__main__":
    app = QtGui.QApplication(sys.argv)
    test_suite = SSITestSuiteGUI()
    test_suite.show()
    # Close app only when window is closed.
    sys.exit(app.exec_())

我尝试实施此解决方案：https://gist.githubusercontent.com/metalman/10721983/raw/15c6f115f9918fee7c1b88d0a549d4cc59a5b346/qapplication_about_to_quit_signal.py

但是出现错误：

attributeerror: 'function' object has no attribute '__pyqtSignature__'

感谢您的宝贵时间。

更新：

将以下建议添加为：

@QtCore.pyqtSlot()
def stop(self):
    return

在我的 SSITesterThread Class 中，当各种 "emits" 我在线程中用作信号时突然尝试访问 NoneType 对象时出错：

File in gui.py, line 75 in tester,
self.updateColor.emit("{}".format(thread_colors.green_alert)
AttributeError: "NoneType" object has no attribute 'green alert'

修复成功了吗，这是一个新问题？因为似乎事情仍然没有正常关闭。

Answer 1

您可能只需要将 stop 方法装饰为插槽即可。

@QtCore.pyqtSlot()
def stop(self):
   # do thread cleanup, stop thread

Answer 2

您似乎是从 QTDesigner 生成的表单中导入 GUI。试试这个：

self.ui.closeEvent = self.closeEvent

我认为您的问题是您在错误的位置编辑了错误的 QMainWindow 实例。

在 GUI Close 上终止所有 QThreads

Terminate All QThreads on GUI Close

pyqt4

python-2.7