我使用的是Python 2.7和kivy。我运行test.py,在直接从文件夹中替换test.png之后,click on press me然后没有显示新的图像。有人能告诉我如何刷新图像吗?test.pyfrom kivy.uix.popup import Popup
from kivy.uix.button import Buttonfrom kivy.lang import Bu
Button from kivy.uix.popup import Popup class Kivy_uihelp to callback evertime, submitted button is pressed self.popup.content.text= self.text_input.text