如何使用PyQT5在一个循环中将多个HTML文档转换为PDF

import pdfkit
from PyQt5.QtWidgets import QApplication, QMainWindow, QPushButton, QVBoxLayout, QWidget

class PDFConverterApp(QMainWindow):
    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):
        self.setWindowTitle('PDF Converter')
        self.setGeometry(100, 100, 300, 200)

        layout = QVBoxLayout()
        self.button = QPushButton('Convert HTML to PDF', self)
        self.button.clicked.connect(self.convert_html_to_pdf)
        layout.addWidget(self.button)

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

    def convert_html_to_pdf(self):
        html_files = ['file1.html', 'file2.html', 'file3.html']  # 假设有这些HTML文件
        for html_file in html_files:
            output_pdf = html_file.replace('.html', '.pdf')
            pdfkit.from_file(html_file, output_pdf)
            print(f'Converted {html_file} to {output_pdf}')

if __name__ == '__main__':
    app = QApplication([])
    converter_app = PDFConverterApp()
    converter_app.show()
    app.exec_()