a python program to translate

translate_google.py

#coding=utf-8  
# trans.py   
# create :2010-6-2  
# last modify: 2010-6-3  
# author : ice_cube  
  
import urllib,urllib2    
from sgmllib import SGMLParser    
  
class URLLister(SGMLParser):    
    """ 
    页面分析 
    """  
    def reset(self):    
        SGMLParser.reset(self)    
        self.result = []    
        self.open = False   
  
    def start_span(self, attrs):    
        id = [v for k, v in attrs if k=='id']    
        if 'result_box' in id:    
            self.open = True   
              
    def handle_data(self, text):    
        if self.open:    
            self.result.append(text)    
            self.open = False   
  
class GoogleTranslate(object):  
    def __init__(self):  
        self.url = 'http://translate.google.cn/translate_t'   
  
    def en2zh(self, text):  
        """从英文翻译到中文  text为要翻译的内容"""  
        values={'hl':'zh-CN','ie':'utf8','text':text,'langpair':"en|zh-CN"}    
        result = self.get_result(values)  
        return result  
  
    def zh2en(self, text):  
        """从中文翻译到英文  text为要翻译的内容"""  
        values={'hl':'zh-CN','ie':'utf8','text':text,'langpair':"zh-CN|en"}    
        result = self.get_result(values)  
        return result  
  
    def get_result(self, values):  
        result = ""  
        data = urllib.urlencode(values)    
        req = urllib2.Request(self.url, data)    
        req.add_header('User-Agent', "Mozilla/5.0+(compatible;+Googleb/2.1;++http://www.google.com/bot.html)")    
        response = urllib2.urlopen(req)    
        parser = URLLister()    
        parser.feed(response.read())    
        parser.close()    
        for i in parser.result:    
            result += i + " "  
        return result  
  
if __name__ == "__main__":  
    trans = GoogleTranslate()  
    while True:    
        text = raw_input("请输入要翻译的英文(退出输入q)：")    
        if text=='q':    
            break;    
        print "翻译结果:"
        		
        print "中文：",trans.en2zh(text)  
        print "英文：",trans.zh2en(text)