python爬虫之有道翻译

import urllib.request
import urllib.parse
import json

class Translate():
    def __init__(self):
        self.url = 'http://fanyi.youdao.com/translate?smartresult=dict&smartresult=rule&smartresult=ugc&sessionFrom=http://www.youdao.com/'
        self.headers = {
            'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) \
            AppleWebKit/537.36 (KHTML, like Gecko) Chrome/47.0.2526.80 Safari/537.36'}
        # Form Data
        self.data = {}
        self.data['type'] = 'AUTO'
        self.data['i'] = 'python 语言'# 翻译文本
        self.data['doctype'] = 'json'
        self.data['xmlVersion'] = '1.8'
        self.data['keyfrom'] = 'fanyi.web'
        self.data['ue'] = 'UTF-8'
        self.data['action'] = 'FY_BY_CLICKBUTTON'
        self.data['typoResult'] = 'true'

    def tanslate(self,words):
        self.data['i'] = words
        data = urllib.parse.urlencode(self.data).encode('utf-8')
        response = urllib.request.urlopen(self.url,data)

        # 解析json字符串
        html = response.read().decode('utf-8')
        target = json.loads(html)
        return target['translateResult'][0][0]['tgt']

if __name__=='__main__':
    trans = Translate()
    result = trans.tanslate('开源中国')
    print(result)