为什么这个 ValueError: Could not save to PNG for display in python3.0 显示？

Question

I am a complete newbie to this coding and programming and I need your help guys.

blue = Image.open('blue_color.png')
blue.putalpha(128)
blue

output

ValueError: Could not save to PNG for display

Answer 1

The runtime is probably broken the runtime due to a library conflict during installation. The same case occurred in cv2_imshow(), which was working well.
In my case, running [Restart runtime] cleared the bug.

• menu / Runtime / [Restart runtime]