The sample is using Flask microframework and is intented to test the Python support on Pivotal's Cloud Foundry.
cf push <YOUR_APP_NAME> -m 128M -b https://github.com/heroku/heroku-buildpack-python.git
or
cf push <YOUR_APP_NAME> -m 128M -b https://github.com/joshuamckenty/heroku-buildpack-python.git
or
cf push <YOUR_APP_NAME> -m 128M -b https://github.com/ephoning/heroku-buildpack-python.git
2014/02/18: The offical Heroku buildpack seems not to be working with Cloud Foundry.