def start_event_loop_qt4(app=None):
 if (app is None):
  app = get_app_qt4([''])
 if (not is_event_loop_running_qt4(app)):
  app._in_event_loop = True
  app.exec_()
  app._in_event_loop = False
 else:
  app._in_event_loop = True

def start_event_loop_qt4 ( app = None ) : if ( app is None ) : app = get_app_qt4 ( [ '' ] ) if ( not is_event_loop_running_qt4 ( app ) ) : app . _in_event_loop = True app . exec_ ( ) app . _in_event_loop = False else : app . _in_event_loop = True
start the qt4 event loop in a consistent manner .