import sys
from time import sleep
from PySide.QtCore import *
from PySide.QtGui import *
from PySide.QtWebKit import *

class MainWindow(QMainWindow):
    URL = 'http://some.url'

    def __init__(self, parent=None):
        super(MainWindow, self).__init__(parent)
        self.browser = QWebView()
        self.setCentralWidget(self.browser)
        self.browser.loadFinished.connect(lambda ok: self.loadFinished(ok))
        self.browser.load(self.URL)

    def loadFinished(self, ok):
        print ok
        if not ok:
            self.browser.load(self.URL)

if __name__ == '__main__':
    app = QApplication(sys.argv)
    app.setApplicationName('smth')
    app.setOrganizationName('smth')
    app.setOrganizationDomain('smth')

    form = MainWindow()
    form.show()

    sys.exit(app.exec_())