如何在QLineedit完成器中删除光标

from PyQt5.QtWidgets import QApplication, QLineEdit, QVBoxLayout, QWidget
import sys

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

    def initUI(self):
        layout = QVBoxLayout()
        line_edit = QLineEdit()
        line_edit.setCompleter(None)  # 禁用自动完成器
        layout.addWidget(line_edit)

        self.setLayout(layout)

        line_edit.textEdited.connect(self.handleTextEdited)

    def handleTextEdited(self, text):
        cursor_position = line_edit.cursorPosition()
        line_edit.setText(text[:cursor_position] + text[cursor_position+1:])
        line_edit.setCursorPosition(cursor_position-1)

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