[PyQt] Different QWebView objects gives identical output for same urls

[Florian Bruhin]

* Герасимов Михаил <Gerasimov-M-N at yandex.ru> [2015-02-11 17:04:06 +0300]:
> I found that if we load one url with different QWebView objects parallely,
> we will have identical output: only one of this QWebView will make real
> request. Here is example:
> 
> ...
> 
> It was surprising. How can we get "fair", unique output for each QWebView
> object, If url is the same?

Weird.

First I suspected an issue with late binding in the closure:
http://docs.python-guide.org/en/latest/writing/gotchas/#late-binding-closures

However this doesn't seem to be the case here... I then simplified the
script a bit and added some prints:

    import functools
    from PyQt5.QtCore import QUrl
    from PyQt5.QtWidgets import QApplication
    from PyQt5.QtWebKitWidgets import QWebView

    def on_ready(v):
        print(v)
        print(v.page())
        print(v.page().mainFrame())
        print(v.page().mainFrame().documentElement())
        print(v.page().mainFrame().documentElement().toPlainText())

    if __name__ == '__main__':
        app = QApplication([])

        # This url outputs random number:
        url = QUrl('https://www.random.org/integers/?num=1&min=1&max=100&col=1&base=10&format=plain&rnd=new')

        view = QWebView()
        view.load(url)
        view.loadFinished.connect(functools.partial(on_ready, view))

        view2 = QWebView()
        view2.load(url)
        view2.loadFinished.connect(functools.partial(on_ready, view2))
        view2.loadFinished.connect(app.quit)

        app.exec_()

Output:

    <PyQt5.QtWebKitWidgets.QWebView object at 0x7f2c159c98b8>
    <PyQt5.QtWebKitWidgets.QWebPage object at 0x7f2c159c9948>
    <PyQt5.QtWebKitWidgets.QWebFrame object at 0x7f2c159c99d8>
    <PyQt5.QtWebKit.QWebElement object at 0x7f2c109630b8>
    66

    <PyQt5.QtWebKitWidgets.QWebView object at 0x7f2c159c9828>
    <PyQt5.QtWebKitWidgets.QWebPage object at 0x7f2c159c99d8>
    <PyQt5.QtWebKitWidgets.QWebFrame object at 0x7f2c159c9948>
    <PyQt5.QtWebKit.QWebElement object at 0x7f2c109630b8>
    66

Note there are dedicated view/page/frame elements, but the
documentElement is the same in both cases. I can't figure out why that
is though...

Florian

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