gistfile1.py

# coding=utf-8

# Google async translate demo using Tornado 
# Author: Sébastien Arnaud (arnaudsj@gmail.com)
# License: Creative Commons Attribution-Share Alike 3.0 United States License (http://creativecommons.org/licenses/by-sa/3.0/us).

import tornado.httpclient as httpclient
import tornado.ioloop as ioloop
import urllib
import simplejson as json

def handle_response(response):
	if response.error:
		print "Error:", response.error
		result = None
	else:
		result = response.body
	
	# Stop the async IO loop	
	ioloop.IOLoop.instance().stop()
	
	# Display the result if any
	if result!=None:
		translation = json.loads(result)
		print "text was translated as %s and means: %s" % (translation[1],translation[0])

def translate(text, target_language):
	# Use Google translate
	google_translate_url = "http://www.translate.google.com/translate_a/t"
	google_translate_params = urllib.urlencode({'client':'t', 'sl':'auto','tl':target_language,'text':text.encode('utf-8')})
	
	# Build and fire the Async request
	http_client = httpclient.AsyncHTTPClient()
	http_req = httpclient.HTTPRequest( "%s?%s" % (google_translate_url, google_translate_params) , method="GET")
	http_client.fetch(http_req, handle_response)

	# Start the async IO loop
	ioloop.IOLoop.instance().start()
	
if __name__=="__main__":
	target_language = "en"
	text = u"Je suis un méchant loup."
	translate(text, target_language)