Pyqt webkit 开启状态 后面的代码无法继续执行

class baidubro(QtCore.QObject):
    """docstring for baidubor"""
    def __init__(self):
        QObject.__init__(self)
        self.fuck='123'
        self.app = QApplication(sys.argv)
        self.webview = QWebView()  
        self.page=self.webview.page()
        self.current = "https://passport.baidu.com/v2/?reg"  
        self.frame = self.page.mainFrame()       
        QtCore.QObject.connect(self.frame,QtCore.SIGNAL('loadFinished(bool)'),self.do_do)
        self.webview.show() 
        self.frame.load(QUrl(self.current))
        sys.exit(self.app.exec_())
    def do_do(self,bool):
        url = self.frame.url()
        js="setTimeout(function (){document.getElementById('TANGRAM__PSP_4__account').value="+self.fuck+";document.getElementById('TANGRAM__PSP_4__password').value='11111';document.getElementById('TANGRAM__PSP_4__password').focus();},1800);setTimeout(function (){document.getElementById('TANGRAM__PSP_4__verifyCodeSend').click();},2800)"
        self.frame.evaluateJavaScript(js)

import baidubro
baidubro.baidubro()
print 'asd'