QT5 WebView to PDF printer

gistfile1.py

#!/usr/bin/env python3

import os
import sys
import argparse

from PyQt5.QtCore import QUrl
from PyQt5.QtPrintSupport import QPrinter
from PyQt5.QtWebKitWidgets import QWebView
from PyQt5.QtWidgets import QApplication


class PrinterView(QWebView):
    def __init__(self, url, filename, do_preview, parent=None):
        super(PrinterView, self).__init__(parent)
        self.do_preview = do_preview
        self.setUrl(QUrl(url))
        self.setZoomFactor(1)

        self.printer = QPrinter(QPrinter.HighResolution)
        self.printer.setOutputFileName(filename)
        self.printer.setOutputFormat(QPrinter.PdfFormat)
        self.printer.setOrientation(QPrinter.Portrait)
        self.printer.setPaperSize(QPrinter.A4)
        self.printer.setFullPage(True)

        self.loadFinished.connect(self.onloadFinished)

    def onloadFinished(self):
        if self.do_preview:
            self.show()
        else:
            self.print_(self.printer)
            QApplication.exit(os.EX_OK)

if __name__ == '__main__':
    app = QApplication(sys.argv)
    parser = argparse.ArgumentParser()
    parser.add_argument("--url", "-i", help="Input URL (http://example.com, file:///home/user/example.html, ...)", required=True)
    parser.add_argument("--output", "-o", help="Write pdf to this file", required=True)
    parser.add_argument("--preview", "-p", help="Open preview", action="store_true")
    args = parser.parse_args()
    a = PrinterView(args.url, args.output, args.preview)
    sys.exit(app.exec_())