How to use the labelme.label_file.LabelFile.load_image_file function in labelme

) % (e, label_file)
                )
                self.status(self.tr("Error reading %s") % label_file)
                return False
            self.imageData = self.labelFile.imageData
            self.imagePath = osp.join(
                osp.dirname(label_file),
                self.labelFile.imagePath,
            )
            if self.labelFile.lineColor is not None:
                self.lineColor = QtGui.QColor(*self.labelFile.lineColor)
            if self.labelFile.fillColor is not None:
                self.fillColor = QtGui.QColor(*self.labelFile.fillColor)
            self.otherData = self.labelFile.otherData
        else:
            self.imageData = LabelFile.load_image_file(filename)
            if self.imageData:
                self.imagePath = filename
            self.labelFile = None
        image = QtGui.QImage.fromData(self.imageData)

        if image.isNull():
            formats = ['*.{}'.format(fmt.data().decode())
                       for fmt in QtGui.QImageReader.supportedImageFormats()]
            self.errorMessage(
                self.tr('Error opening file'),
                self.tr(
                    '<p>Make sure <i>{0}</i> is a valid image file.<br>'
                    'Supported image formats: {1}</p>'
                ).format(filename, ','.join(formats))
            )
            self.status(self.tr("Error reading %s") % filename)