如何在QTextEdit中自定义热键？

from PyQt5.QtWidgets import QTextEdit, QApplication
from PyQt5.QtGui import QKeySequence

class CustomTextEdit(QTextEdit):
    def __init__(self, parent=None):
        super().__init__(parent)
        self.setHotkey(QKeySequence("Ctrl+D"))  # 设置默认热键为Ctrl+D

    def setHotkey(self, hotkey):
        self.hotkey = hotkey

    def keyPressEvent(self, event):
        if event.matches(self.hotkey):
            # 执行自定义热键操作
            self.insertPlainText("自定义热键被触发！")
        else:
            super().keyPressEvent(event)

if __name__ == "__main__":
    app = QApplication([])
    text_edit = CustomTextEdit()
    text_edit.show()
    app.exec_()