如何为我的PyQt5浏览器制作加载器

pip install PyQt5

from PyQt5.QtCore import QUrl
from PyQt5.QtWidgets import QApplication, QMainWindow, QProgressBar
from PyQt5.QtWebEngineWidgets import QWebEngineView

class Loader(QMainWindow):
    def __init__(self):
        super().__init__()

        # 设置窗口标题和大小
        self.setWindowTitle("PyQt5 Browser Loader")
        self.setGeometry(100, 100, 800, 600)

        # 创建进度条并设置样式
        self.progress_bar = QProgressBar(self)
        self.progress_bar.setGeometry(0, 0, 800, 5)
        self.progress_bar.setStyleSheet("QProgressBar {border: 1px solid grey; border-radius: 2px;}")
        self.progress_bar.setMaximum(100)

        # 创建Web视图并加载URL
        self.web_view = QWebEngineView(self)
        self.web_view.load(QUrl("https://www.example.com"))

        # 将Web视图和进度条添加到主窗口
        self.setCentralWidget(self.web_view)
        self.statusBar().addPermanentWidget(self.progress_bar)

        # 监听加载进度信号并更新进度条
        self.web_view.loadProgress.connect(self.update_progress_bar)

    def update_progress_bar(self, progress):
        self.progress_bar.setValue(progress)

if __name__ == "__main__":
    app = QApplication([])
    loader = Loader()
    loader.show()
    app.exec_()