Something

from PyQt4 import QtCore, QtNetworkimport sysclass App(QtCore.QCoreApplication):    def __init__(self, argv):        QtCore.QCoreApplication.__init__(self, argv)        self.nam = QtNetwork.QNetworkAccessManager()    def exec_(self):        self.rep = self.nam.get(QtNetwork.QNetworkRequest(QtCore.QUrl('localhost:8888')))        self.rep.finished.connect(self.foo)        self.startTimer(2000)        QtCore.QCoreApplication.exec_()    def foo(self):        pass    def timerEvent(self, id):        self.rep.finished.disconnect()        self.rep.abort()app = App(sys.argv)app.exec_()