Your observation with Python being the only real approach within Matillion to process files is correct. There isn't any out of the box components that do this type of work. I believe in informatica, they leveraged 3rd party libraries under their components to do a lot of what look like magic when it came to file processing. I suppose there is a potential to find similar 3rd party libraries and leverage them but this would be as you stated, a Python approach and not an out of the box solution. I hope this helps in someway.