How to serve an app using python paste

How to serve an app using python paste
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1)
* config.ini
[app:main]
paste.app_factory = service_app:app_factory

2)
* deploy.py
from paste import httpserver
from paste.deploy import loadapp
app = loadapp('config:config.ini', relative_to='.')
httpserver.serve(app, host='127.0.0.1', port='8080')

3)
* service_app.py
def application(environ, start_response):
    """Simple WSGI application"""
    response_headers = [('Content-type','text/plain')]
    status = '200 OK'
    start_response(status, response_headers)
    if environ['PATH_INFO'] == '/login':
    #http://pythonpaste.org/modules/recursive.html
        return ["login page"]
    else:
        return ['Hello world']

def app_factory(global_config, **local_config):
    """This function wraps our simple WSGI app so it
    can be used with paste.deploy"""
    return application

4)
How to run
#python deploy.py
serving on http://127.0.0.1:8080

5)
goto the urls
http://127.0.0.1:8080
http://127.0.0.1:8080/login