python 3.x-这个类出了什么问题?(QDBusAbstractAdaptor)

Question

我有以下类：

    class DBusAdaptor(QDBusAbstractAdaptor):
        Q_CLASSINFO("D-Bus Interface", 'org.kde.kdialog.ProgressDialog')
        Q_CLASSINFO("D-Bus Introspection", '''<interface name="org.kde.kdialog.ProgressDialog">
            <property name="maximum" type="i" access="readwrite"/>
            <method name="close"/>
            </interface>''')
        def __init__(self, parent):
            super(DBusAdaptor, self).__init__(parent)
            self.parent = parent
        @pyqtSlot()
        def close(self):
            self.parent.close()
        @pyqtProperty(int)
        def maximum(self): # BUG: No such method 'maximum' in any interface at object path '/ProgressDialog' (signature '') 
            return self.parent.progressBar.maximum()
        @maximum.setter
        def maximum(self, maximum):
            self.parent.progressBar.setMaximum(maximum)        

它因以下错误而失败：

$ qdbus org.kde.kdialog-15070 /ProgressDialog maximum
Error: org.freedesktop.DBus.Error.UnknownMethod
No such method 'maximum' in any interface at object path '/ProgressDialog' (signature '')

二传手打得很好，所以我不知道这里出了什么问题。

Answer 1

我对适配器有一个误解：这里有一个例子帮助我理解了它的工作原理：

http://permalink.gmane.org/gmane.comp.python.pyqt-pykde/24405