unittest vs py.test?

[Roy Smith]

In article <_4-dnaRR8dv8dNDfRVn-tg at powergate.ca>,
 Peter Hansen <peter at engcorp.com> wrote:

> As for Roy's comments: I use a small internally
> developed driver script which uses os.walk to find
> all the files matching tests/*_unit.py or tests/story*.py
> in all subfolders of the project, and which runs them
> in separate processes to ensure none can pollute
> the environment in which other tests run.  I can
> dispense with the unittest.main() call, but I like
> to be able to run the tests standalone.  I guess
> with py.test I couldn't do that...

Actually, I believe it does.  I'm just starting to play with this, but it 
looks like you can do:

py.test test_sample.py

and it'll run a single test file.  I imagine you could use your os.walk 
fixture in combination with this to run each test in its own process if you 
wanted to.