Translate between french and english using google api

gtranslate.py

# -*- coding: iso-8859-15 -*-

import Tkinter as tkinter
import urllib2, urllib
import json

TRANSLATE_URL = 'http://ajax.googleapis.com/ajax/services/language/translate'

TO_ENGLISH = 'fr|en'
TO_FRENCH = 'en|fr'


def translate(lang_pair, word):
    params = { 'v': '1.0',
             'langpair': lang_pair,
             'q': word }  
    
    url = TRANSLATE_URL + '?' + urllib.urlencode(params)
    response = json.loads(urllib2.urlopen(url).read())
    return response['responseData']['translatedText']
    
    
class TranlateFrame(tkinter.Frame, object):
    
    def __init__(self, parent):
        super(TranlateFrame, self).__init__(parent)

        tkinter.Label(self, text='Enter text').grid(row=0, column=0)
        
        self.word_to_translate = tkinter.StringVar()
        self.entry = tkinter.Entry(self, textvariable=self.word_to_translate)
        self.entry.grid(row=0, column=1, columnspan=2)
        
        tkinter.Button(self, text='In english', 
                        command=self.translate(TO_ENGLISH), 
                        underline=3).grid(row=1, column=1)
            
        tkinter.Button(self, text='En français', 
                        command=self.translate(TO_FRENCH), 
                        underline=3).grid(row=1, column=2)
        
        parent.bind('<Alt_L> <e>', self.translate(TO_ENGLISH))
        parent.bind('<Alt_L> <f>', self.translate(TO_FRENCH))

        self.entry.focus()


    def translate(self, lang_pair):
        def trans(*args):
            translated = translate(lang_pair, self.word_to_translate.get().strip())
            self.word_to_translate.set(translated)
        return trans

    
if __name__ == '__main__':
    root = tkinter.Tk()
    root.title('Google translate')
    
    f = TranlateFrame(root)
    f.pack()
    
    root.mainloop()