qt.qpa.xcb: could not connect to display

[redaghanem]

Hi, thanks for sharing your code

I get this error when try to run
!python demo.py

i use google colab

qt.qpa.xcb: could not connect to display
qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, webgl, xcb.

[bm1905]

Basically you cannot run qt in the cloud.

More description here:
https://stackoverflow.com/questions/56491808/could-not-connect-to-any-x-display-google-colab-run-time