calling a simple PyQt application more than once

[Jabba Laci]

Hi,

I have a simple PyQt application that creates a webkit instance to
scrape AJAX web pages. It works well but I can't call it twice. I
think the application is not closed correctly, that's why the 2nd call
fails. Here is the code below. I also put it on pastebin:
http://pastebin.com/gkgSSJHY .

The question is: how to call this code several times within a script.

Thanks,

Laszlo

=====

import sys

from PyQt4.QtGui import QApplication
from PyQt4.QtWebKit import QWebPage
from PyQt4.QtCore import QUrl

class SimpleWebkit(QWebPage):
    def __init__(self, url):
        self.app = QApplication(sys.argv)
        QWebPage.__init__(self)
        self.loadFinished.connect(self.save)
        self.mainFrame().load(QUrl(url))
        self.app.exec_()

    def save(self):
        self.html = self.mainFrame().toHtml()
        self.app.quit()

def get_html(url):
    s = SimpleWebkit(url)
    return str(s.html)      # QString to string !

#####

if __name__ == "__main__":
    url = 'http://simile.mit.edu/crowbar/test.html'
    print get_html(url)     # OK
    print '=========='
    print get_html(url)     # problem here, never called :(