Python PyQt5：使用进度更新启动、停止和暂停线程

我的程序中有一些线程问题.我有一个主程序和一个GUI类，都是用PyQt创建的.我为自己的问题创建了一个小例子.

QBackingStore::endPaint() called with active painter on backingstore paint device
QObject::setParent: Cannot set parent, new parent is in a different thread

这些alert 是由不同的线程引起的.但老实说，我不知道如何处理对象，比如gui类的进度条.

线程化的原因是，脚本在运行时仍然可以与之交互.

附件是我的两个python文件:我的程序和gui.

主程序:

#MAINPROGRAM

from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtWidgets import QApplication
import sys
import GUI
import threading
import time

class exampleprogram(QtWidgets.QMainWindow, GUI.Ui_MainWindow):
    def __init__(self, parent=None):
        super(exampleprogram, self).__init__(parent)
        self.setupUi(self)
        self.pushButton_Start.clicked.connect(self.start)
        self.pushButton_Stop.clicked.connect(self.stop)
        self.running = False
            
    def start(self):
        if(self.running == False):
            print("Start")
            self.thread = threading.Thread(target=self.run, args=())
            self.thread.start()            
            
    def stop(self):
        print("Stop")
        self.running = False
        
    def run(self):
        self.running = True
        x = 0
        thread = threading.currentThread()
        while getattr(thread, "do_run", True):
            self.thread.do_run = self.running
            if(x == 100):
                thread.do_run = False
            self.progressBar.setValue(x)
            time.sleep(0.1)
            x = x+1
        self.stop()

def main():
    app = QApplication(sys.argv)
    form = exampleprogram()
    form.show()
    app.exec_()

if __name__ == '__main__':
    main()

GUI:

#GUI

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(573, 92)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.layoutWidget = QtWidgets.QWidget(self.centralwidget)
        self.layoutWidget.setGeometry(QtCore.QRect(20, 20, 195, 30))
        self.layoutWidget.setObjectName("layoutWidget")
        self.formLayout_3 = QtWidgets.QFormLayout(self.layoutWidget)
        self.formLayout_3.setContentsMargins(0, 0, 0, 0)
        self.formLayout_3.setObjectName("formLayout_3")
        self.pushButton_Start = QtWidgets.QPushButton(self.layoutWidget)
        self.pushButton_Start.setObjectName("pushButton_Start")
        self.formLayout_3.setWidget(0, QtWidgets.QFormLayout.LabelRole, self.pushButton_Start)
        self.pushButton_Stop = QtWidgets.QPushButton(self.layoutWidget)
        self.pushButton_Stop.setObjectName("pushButton_Stop")
        self.formLayout_3.setWidget(0, QtWidgets.QFormLayout.FieldRole, self.pushButton_Stop)
        self.progressBar = QtWidgets.QProgressBar(self.centralwidget)
        self.progressBar.setGeometry(QtCore.QRect(230, 20, 311, 23))
        self.progressBar.setProperty("value", 0)
        self.progressBar.setObjectName("progressBar")
        MainWindow.setCentralWidget(self.centralwidget)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "Test Gui"))
        self.pushButton_Start.setText(_translate("MainWindow", "Start"))
        self.pushButton_Stop.setText(_translate("MainWindow", "Stop"))


if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    MainWindow = QtWidgets.QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.show()
    sys.exit(app.exec_())

有没有人有什么 idea ，如何解决？

编辑:停止运行功能后，应可以通过按开始按钮再次运行.因此，它是否被计数器x或按下停止按钮停止并不重要.重要的是不要多次启动功能.

非常感谢！

安德鲁