PyQt:选择某个下拉值时，使QLabel消失

import sys
from PyQt5.QtWidgets import QApplication, QWidget, QLabel, QComboBox, QVBoxLayout

class Example(QWidget):
    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):
        self.setWindowTitle('PyQt Example')
        layout = QVBoxLayout()

        # 创建下拉列表
        self.comboBox = QComboBox()
        self.comboBox.addItem('Option 1')
        self.comboBox.addItem('Option 2')
        self.comboBox.addItem('Option 3')
        layout.addWidget(self.comboBox)

        # 创建标签
        self.label = QLabel('This is a label')
        layout.addWidget(self.label)

        # 连接信号和槽函数
        self.comboBox.currentIndexChanged.connect(self.onComboBoxIndexChanged)

        self.setLayout(layout)
        self.show()

    def onComboBoxIndexChanged(self, index):
        selected_option = self.comboBox.currentText()
        if selected_option == 'Option 1':
            self.label.hide()
        else:
            self.label.show()

if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = Example()
    sys.exit(app.exec_())