Fails to load PNG

wxPython Users
1

I just re-installed Ubuntu 18.04 on my computer due to some error in booting.
I re-installed python version is 3.9 in Anaconda environment, then installed all the packages I use.

wxPython 4.1.1 was installed via “conda install -c conda-forge wxpython”

My program was working fine before all these re-installations.
Now when I launch it,
first, it complains…
Gtk-Message: 23:58:28.372: Failed to load module “canberra-gtk-module”
(By the way, I made sure that both ‘libcanberra-gtk-module’ and ‘libcanberra-gtk3-module’ are installed.)

Then, it fails to load PNG image, saying that the image is invalid.

bmp = wx.Bitmap(img)
wx._core.wxAssertionError: C++ assertion ““image.IsOk()”” failed at /home/conda/feedstock_root/build_artifacts/wxpython_1651509130300/work/ext/wxWidgets/src/gtk/bitmap.cpp(640) in wxBitmap(): invalid image

The image is fine. I can open it in other programs and
if I exports the image as JPG, wxPython loads it fine.
Changing all my images to JPG will be one solution to me.

But, is there something obvious I’m missing to make wxPython working with PNG files?

2

What helped me was what it says on

I downloaded the missing piece from amd64 build of libpng 1.2.54-1ubuntu1.1 : Private PPA for Ubuntu Security Team : “Ubuntu Security Team” team
Though, it was two years ago, and I’ve switched to Mint since then, but I guess you being on 18.04 is exactly what was the matter at the time.