Can you maybe print action_size. Just so I can see what this list contains.
Just do the same as you did with
but remove the type() so it’s just print(action_size) and post the result.
But judging from this error
it actually should have worked, but there might be a problem with CUDA or graphics driver version, or you are trying to use CUDA when you are supposed to use cpu (e.g. if you are on a cpu installation of pytorch or don’t have a compatible gpu)