I'm working on getting this running. Instead of "venv/bin/activate" I had to run "source venv/bin/activate". And I got an error installing the requirements, fixed by running "pip install pyyaml" as a separate command.
I haven't been able to make sense of n-samples and n-iters. Changing the former caused generation to freeze at 0%. Changing the latter seems to generate multiple images, even though the SD docs for n-iters are "sample this often".