构建简单的终端pyqt4和pyserial如何更新文本浏览器

import sys
import serial
from PyQt4 import QtGui, QtCore

class Terminal(QtGui.QMainWindow):
    def __init__(self):
        super(Terminal, self).__init__()

        self.serial_port = serial.Serial('COM1', 9600)  # 串口配置，根据实际情况修改
        self.serial_port.timeout = 1

        self.text_browser = QtGui.QTextBrowser(self)
        self.setCentralWidget(self.text_browser)

        self.timer = QtCore.QTimer(self)
        self.timer.timeout.connect(self.update_text_browser)
        self.timer.start(100)  # 每100ms更新一次文本浏览器

    def update_text_browser(self):
        if self.serial_port.in_waiting:
            data = self.serial_port.read(self.serial_port.in_waiting)
            self.text_browser.append(data.decode())

if __name__ == '__main__':
    app = QtGui.QApplication(sys.argv)
    terminal = Terminal()
    terminal.show()
    sys.exit(app.exec_())