implementing PyQt5 and QThread causing GUI to freeze in Python 3.11
I'm having a hard time understanding Could someone explain I'm deploying to production and I'm stuck trying to I've searched everywhere and can't find a clear answer....... I am currently developing a desktop application using PyQt5 in Python 3.11, and I've encountered a question where the GUI freezes when I run a long-running task in a QThread. I have implemented a worker class that inherits from QThread, but it seems that the signal emitted after the task is completed doesn't update the UI as expected. Here’s the relevant part of my code: ```python from PyQt5.QtCore import QThread, pyqtSignal, QObject from PyQt5.QtWidgets import QApplication, QWidget, QPushButton, QVBoxLayout, QLabel import time class Worker(QThread): finished = pyqtSignal(str) def run(self): time.sleep(5) # Simulating a long-running task self.finished.emit('Task complete!') class MyApp(QWidget): def __init__(self): super().__init__() self.initUI() def initUI(self): self.label = QLabel('Click the button to start the task.') self.button = QPushButton('Start Task') self.button.clicked.connect(self.startTask) layout = QVBoxLayout() layout.addWidget(self.label) layout.addWidget(self.button) self.setLayout(layout) def startTask(self): self.thread = Worker() self.thread.finished.connect(self.onFinish) self.thread.start() def onFinish(self, result): self.label.setText(result) if __name__ == '__main__': app = QApplication([]) window = MyApp() window.show() app.exec_() ``` After starting the task by clicking the button, the GUI becomes unresponsive for 5 seconds, and then the label updates with 'Task complete!'. I’ve tried moving the long-running task into a separate thread as shown, but it still causes the application to freeze. I’ve also confirmed that the thread is indeed starting and finishing correctly. Is there something I’m missing with signal-slot connections or thread management in PyQt5? Any advice on how to avoid the GUI freeze would be greatly appreciated. What am I doing wrong? I'd be grateful for any help. The stack includes Python and several other technologies. I'd really appreciate any guidance on this. I'm using Python latest in this project. Cheers for any assistance! For context: I'm using Python on macOS. Any examples would be super helpful. What would be the recommended way to handle this?