How to make Recaptcha work with QWebView

I'm trying to get PyQt4 to view a web-page that requires a captcha to work, but it says that the browser is unsupported. Here is a screenshot of the message:

Is there any way to fix this?

I was able to get this to work by modifying the user-agent string to include one of the supported browsers:

import sys
from PyQt4 import QtCore, QtGui, QtWebKit

class WebPage(QtWebKit.QWebPage):
    def userAgentForUrl(self, url):
        return super(WebPage, self).userAgentForUrl(url) + ' Chrome'

class Window(QtWebKit.QWebView):
    def __init__(self):
        super(Window, self).__init__()
        self.setPage(WebPage(self))
        self.load(QtCore.QUrl('https://www.google.com/recaptcha/api2/demo'))

if __name__ == '__main__':

    app = QtGui.QApplication(sys.argv)
    window = Window()
    window.setGeometry(600, 100, 600, 900)
    window.show()
    sys.exit(app.exec_())