a hello world page

1. create project directory:
helloworld

2. in the directory, create two files

(1)helloworld.py:

print 'Content-Type: text/plain'

print ''

print 'Hello, world!'

(2)app.yaml

application: helloworld

version: 1

runtime: python

api_version: 1

handlers:

- url: /.*

script: helloworld.py

url: /.*

script: helloworld.py means any url will be handled by helloworld.py

(3)run web server:

dev_appserver.py helloworld

(4) connect to server
127.0.0.1:8080

(5) update to google web server:
appcfg.py helloworld