我可以使用以下代码将kivy图像直接加载到窗口中：请注意widget.length和widget.width不起作用。所以我会使用纹理属性将其缩小吗？
image = value[9] #This is blob data from MYSQL
data = io.BytesIO(image)
img = CoreImage(data, ext="png").texture
widget = Image(source = 'a.jpg')
widget.texture = img
#I have tried widget.size and widget.length here but it doesn't make any difference to the layout.
target.add_widget(widget)