Szymon Kosok wrote:

I have transparent PNG (when I open it in Photoshop it's transparent)
and when I try to open it with PIL there is no "transparency" key in
info. I've tried another transparent PNG (famfamfam icon) and no luck
with that too. What can cause that problem? Mode is "RGBA".

the transparency key is used to mark a given color index as transparent for 8-bit (mode "P") images. an RGBA image has a transparency value for each pixel (that's what the "A" in the mode name stands for).

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