Qt for Python (PySide/Shiboken)

from PySide2.QtWidgets import QApplication, QMainWindow, QPushButton from PySide2.QtWebEngineWidgets import QWebEnginePage from PySide2.QtCore import QUrl import sys class MainWindow(QMainWindow): def __init__(self): super().__init__() button = QPushButton("Print!") button.clicked.connect(self.the_button_was_clicked) # Set the central widget of the Window. self.setCentralWidget(button) def the_button_was_clicked(self): # qurl = QUrl() url = QUrl.fromUserInput("file:///home/dev/Images/source.svg") file = "output.pdf" qwp = QWebEnginePage() qwp.load(url) qwp.printToPdf(file) Can someone help me understand why the code above does not work?