实现自己的javaScriptConsoleMessage会阻止开发Web检查器工作

Question

我有一个带有QWebView和隐藏的开发Web检查器的对话框。我已经将QWebPage子类化为重新实现javaScriptConsoleMessage，以便在发生JS错误时显示检查器。但是，当我重新实现javaScriptConsoleMessage时，检查器停止工作 - 它是空白的。

class WebPage(QWebPage):
    """ Makes it possible to use a Python logger to print javascript console messages """
    def __init__(self, logger=None, parent=None):
        super(WebPage, self).__init__(parent)
        if not logger:
            logger = logging
            self.logger = logger

    def javaScriptConsoleMessage(self, msg, lineNumber, sourceID):
        self.logger.warning("JS " + sourceID + ":" + unicode(lineNumber) + "\n" + msg)
        # code here to reveal inspector

我怎样才能让它发挥作用？