在PyQt应用程序中终止长时间运行的Python命令

import sys
import time
from PyQt5.QtWidgets import QApplication, QMainWindow, QPushButton, QMessageBox
from PyQt5.QtCore import QThread, pyqtSignal

class WorkerThread(QThread):
    finished = pyqtSignal()  # 定义一个信号，用于通知主线程任务已完成

    def __init__(self):
        super().__init__()

    def run(self):
        # 长时间运行的Python命令
        for i in range(10):
            time.sleep(1)
            print(i)

        self.finished.emit()  # 发送任务完成的信号

class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()

        self.initUI()

    def initUI(self):
        self.setGeometry(300, 300, 250, 150)
        self.setWindowTitle('Long Running Command')

        self.btn = QPushButton('Start', self)
        self.btn.clicked.connect(self.startLongRunningCommand)
        self.btn.move(50, 50)

    def startLongRunningCommand(self):
        self.btn.setEnabled(False)  # 禁用按钮，避免重复点击

        self.workerThread = WorkerThread()
        self.workerThread.finished.connect(self.onLongRunningCommandFinished)
        self.workerThread.start()

    def onLongRunningCommandFinished(self):
        self.btn.setEnabled(True)  # 启用按钮
        QMessageBox.information(self, 'Finished', 'Long running command has finished.')

if __name__ == '__main__':
    app = QApplication(sys.argv)
    mainWindow = MainWindow()
    mainWindow.show()
    sys.exit(app.exec_())