Trouble with PyQt5 signal-slot connections for dynamic GUI updates in Python 3.9
I tried several approaches but none seem to work. I'm trying to implement I've been banging my head against this for hours... After trying multiple solutions online, I still can't figure this out. Hey everyone, I'm running into an issue that's driving me crazy. I'm developing a PyQt5 application where I'm trying to dynamically update a label based on a selection from a dropdown (QComboBox). However, the signal-slot connection doesn't seem to be working as expected. I've set up the connection in the constructor like this: ```python from PyQt5.QtWidgets import QApplication, QWidget, QVBoxLayout, QLabel, QComboBox class MyWindow(QWidget): def __init__(self): super().__init__() self.setWindowTitle('Dynamic Update Example') self.layout = QVBoxLayout(self) self.label = QLabel('Select an option') self.combo = QComboBox() self.combo.addItems(['Option 1', 'Option 2', 'Option 3']) self.layout.addWidget(self.label) self.layout.addWidget(self.combo) # Connecting signal to the slot self.combo.currentIndexChanged.connect(self.update_label) def update_label(self): self.label.setText(f'Selected: {self.combo.currentText()}') app = QApplication([]) window = MyWindow() window.show() app.exec_() ``` When I run the application and change the selection in the combo box, the label does not update. I’ve checked that `update_label` is being called, but the label text remains unchanged. I suspect it might be an scenario with how I'm connecting the signals or how the GUI is being updated, but I'm not sure what I'm missing. Any tips on how to properly implement this in Python 3.9 with PyQt5? I've also tried using a lambda to call `update_label` directly, but it still doesn't work as expected. Additionally, I'm seeing the following warning in the console: `QComboBox::setCurrentIndex: Current index out of range`. Is this related to my scenario? What can I do to troubleshoot this further? For context: I'm using Python on macOS. Thanks in advance! I'd really appreciate any guidance on this. This is part of a larger CLI tool I'm building. The project is a desktop app built with Python. I'd be grateful for any help. I've been using Python for about a year now.