def readModel(self,fileName):
file = QFile(fileName)
if (file.open(QIODevice.ReadOnly | QIODevice.Text)):
xmlReader = QXmlSimpleReader()
xmlReader.setContentHandler(self)
xmlReader.setErrorHandler(self)
xmlSource = QXmlInputSource(file)
xmlReader.parse(xmlSource)
return self.modelData
else:
return None
