Here is my problem: I have 3 layers only I would like to remove all the 
attributes that are not on layer 1, no table of layers will provide a foreign 
key or link. So delete the layer 2 and 3 attributes that are not on layer 1.


Screen : https://i.stack.imgur.com/nnOxd.png

https://gis.stackexchange.com/questions/374754/delete-unnecessary-pyqgis-attributes?noredirect=1#comment612308_374754

Mathias Mirra
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