Question: I need to create a Python REST/JSON web service for an iOS app to interact with. There will be no front end on the web.

What will be the fastest, most lightweight framework to use for this? Learning curve to implement also considered?

From the research I've done Django-Tastypie or Djanjo-Piston look like the best options, with Tastypie winning because the codebase is being maintained actively?

Answer: 
At Pycon Australia, Richard Jones compared the most popular lightweight web frameworks. [Bottle](http://bottlepy.org/docs/dev/) came out on top. Here is the [full presentation](http://www.youtube.com/watch?v=AYjPIMe0BhA).
If I were you I would use [web.py](http://webpy.org/) that is really convenient to do that kind of rapid prototyping of **lightweight REST applications**.
Check out this snippet from the home page:

```
import web

urls = (
    '/(.*)', 'hello'
)
app = web.application(urls, globals())

class hello:        
    def GET(self, name):
        if not name: 
            name = 'World'
        return 'Hello, ' + name + '!'

if __name__ == "__main__":
    app.run()

```