如何使用PyQt5 v5.6qwebengineview“呈现”HTML？

我以前用PyQt5 v5.4.1qwebpage执行过这个任务，但是尝试新的QWebEngineView是suggested。

以下是实现(它通常按预期工作，但对于某些站点和情况有无限期挂起的趋势)：def render(source_html):

"""Fully render HTML, JavaScript and all."""

import sys

from PyQt5.QtWidgets import QApplication

from PyQt5.QtWebKitWidgets import QWebPage

class Render(QWebPage):

def __init__(self, html):

self.html = None

self.app = QApplication(sys.argv)

QWebPage.__init__(self)

self.loadFinished.connect(self._loadFinished)

self.mainFrame().setHtml(html)

self.app.exec_()

def _loadFinished(self, result):

self.html = self.mainFrame().toHtml()

self.app.quit()

return Render(source_html).html

import requests

sample_html = requests.get(dummy_url).text

print(render(sample_html))

下面是我使用QWebEngineView的尝试。首先，在Ubuntu上安装和设置PyQt5 v5.6：# install PyQt5 v5.6 wheel from PyPI

pip3 install --user pyqt5

# link missing resources

ln -s ../resources/icudtl.dat ../resources/qtwebengine_resources.pak ../resources/qtwebengine_resources_100p.pak ../resources/qtwebengine_resources_200p.pak ../translations/qtwebengine_locales ~/.local/lib/python3.5/site-packages/PyQt5/Qt/libexec/

现在对Python来说。。。以下结果导致分段错误：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):

# what's going on here? how can I get the HTML from toHtml?

self.page().toHtml(self.callable)

self.app.quit()

def callable(self, data):

self.html = data

return Render(source_html).html

import requests

sample_html = requests.get(dummy_url).text

print(render(sample_html))

问题似乎在于对异步toHtml()的调用。看起来应该很简单，但我不知道该怎么办。在C++上下文中，我看到它是{{a3}，但我不知道如何将其翻译为Python。我怎样才能把HTML弄出来？

cs