Python 爬虫 ：简单的爬有道翻译

import urllib.request
import urllib.parse
import json
while True :

    content = input("请输入需要翻译的内容:(按q退出)")
    if content == 'q' :
        break
    url = 'http://fanyi.youdao.com/translate?smartresult=dict&smartresult=rule&smartresult=ugc&sessionFrom=https://www.baidu.com/link'
    head = {}
    head[ 'User-Agent'] = 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.143 Safari/537.36'
    data = {}
    data['type'] = 'AUTO'
    data['i'] = content
    data['doctype'] = 'json'
    data['xmlVersion'] = '1.8'
    data['keyfrom']  = 'fanyi.web'
    data['ue'] = 'UTF-8'
    data['action'] = 'FY_BY_CLICKBUTTON'
    data['typoResult'] = 'true'

    data = urllib.parse.urlencode(data).encode('utf-8')
    req = urllib.request.Request(url,data,head)
    response = urllib.request.urlopen(req)

    html = response.read().decode('utf-8')

    target = json.loads(html)

    print("翻译结果：%s" %(target['translateResult'][0][0]['tgt']))