免費google翻譯API

/usr/bin/env python
import urllib2
import sys

URL = 'http://translate.google.cn/translate_a/t?client=t&hl=zh-CN&sl=en&tl=zh-CN&ie=UTF-8&oe=UTF-8&multires=1&prev=btn&ssel=0&tsel=0&sc=1'
HEADER_AGENT = 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.1 (KHTML, like Gecko) Chrome/21.0.1180.89 Safari/537.1'
ERROR_INFO = 'error : no input'

def translate(input):
        search_url = URL + '&text=' + input
        req = urllib2.Request(search_url)
        req.add_header('User-Agent', HEADER_AGENT)
        r = urllib2.urlopen(req)
        value = r.read()
        return value

def toString(argv, sign=" "):
        words = ""
        for word in argv[1:]:
                words = words + sign + word
        return words


if __name__ == '__main__':
        num = len(sys.argv)
        if num <= 1:
                print ERROR_INFO
        else :
                words = toString(sys.argv, "+")
                reprint = toString(sys.argv)
                if words == "":
                        print ERROR_INFO
                else:
                        print reprint
                        ret = translate(words)
                        print ret