[QGIS-Developer] Apply transparency on pixels in an image with PyQGIS

[Herbert N'DZONDZI]

I'm trying to grab the pixels that intersect with my polygon shapefile and
apply transparency to them (that is, I'm trying to create a hole in my
raster)

For that, I get all the pixels that are in the footprint of the shapefile
in a list (see code below)

Then I used the QgsRasterTransparency.TransparentThreeValuePixel () class
to apply transparency, but I get an error message:

Error message: AttributeError: 'Dataset' object has no attribute 'renderer'
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