How to “render” HTML with PyQt5's QWebEngineView

Question

How can I \"render\" HTML with with PyQt5 v5.6 QWebEngineView?

I have previously performed the task with PyQt5 v5.4.1 QWebPage, but it was suggested to try the newe

Answer 1

As you pointed out, Qt5.4 relies on async calls. It's not necessary to use the Loop (as seen on your answer), since your only mistake was to call quit before the toHtml call finishes.

def render(source_html):
    """Fully render HTML, JavaScript and all."""

    import sys
    from PyQt5.QtWidgets import QApplication
    from PyQt5.QtWebEngineWidgets import QWebEngineView

    class Render(QWebEngineView):
        def __init__(self, html):
            self.html = None
            self.app = QApplication(sys.argv)
            QWebEngineView.__init__(self)
            self.loadFinished.connect(self._loadFinished)
            self.setHtml(html)
            self.app.exec_()

        def _loadFinished(self, result):
            # This is an async call, you need to wait for this
            # to be called before closing the app
            self.page().toHtml(self.callable)

        def callable(self, data):
            self.html = data
            # Data has been stored, it's safe to quit the app
            self.app.quit()

    return Render(source_html).html

import requests
sample_html = requests.get(dummy_url).text
print(render(sample_html))