如何将 QTextBrowser 的光标（其中有一个 html 表）移动到 PyQt5 中的特定行？

我创建了一个 QTextBrowser 来在我的代码中显示一个 html 表。但是当我尝试使用setTextCursor方法将光标移动到特定行时，它没有做到这一点。

文本浏览器的滚动条确实移动了，但没有移动到特定的行。这个问题与html表有关吗？

import sys
from PyQt5.QtGui import QTextCursor
from PyQt5.QtWidgets import QWidget, QTextBrowser, QMainWindow, QPushButton, QHBoxLayout, QApplication

class MyTextBrowser(QTextBrowser):

    def __init__(self, parent = None):
        super(MyTextBrowser, self).__init__(parent)
        self.createTable()

    def createTable(self, line_num = 1):
        # Create an html table with 100 lines
        html = '<table><tbody>'
        for i in range(0, 100):
            # Highlight specified line
            if line_num == i+1:
                html += '<tr style="background-color: #0000FF;"><td>Line</td><td>%d</td></tr>' % (i+1)
            else:
                html += '<tr><td>Line</td><td>%d</td></tr>' % (i+1)
        html += '</tbody></table>'
        self.setHtml(html)

        # Move the cursor to the specified line
        cursor = QTextCursor(self.document().findBlockByLineNumber(line_num))
        self.setTextCursor(cursor)

class MyWindow(QMainWindow):

    def __init__(self, parent = None):
        super(MyWindow, self).__init__(parent)
        self.createLayout()

    def createLayout(self):
        # Create the text browser and a button
        self.textBrowser = MyTextBrowser()
        self.button = QPushButton('Move cursor')
        self.button.clicked.connect(self.buttonClicked)
        self.currentLine = 1

        layout = QHBoxLayout()
        layout.addWidget(self.button)
        layout.addWidget(self.textBrowser)

        window = QWidget()
        window.setLayout(layout)
        self.setCentralWidget(window)

    def buttonClicked(self):
        # Move the cursor down for 10 lines when the button is clicked
        self.currentLine += 10
        if self.currentLine > 100:
            self.currentLine = 1

        self.textBrowser.createTable(self.currentLine)

app = QApplication(sys.argv)
window = MyWindow()
window.resize(640, 480)
window.show()
sys.exit(app.exec_())