Python 爬虫小练习--爬取有道词典

#!/usr/local/python3/bin/python3
 
import urllib.request
import urllib.parse
import json
import time

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'
    #新版的有道词典,在请求时启用了md5认证,去掉原url中的 "_o" 可免认证
 
    data = {}
    data['i'] = content
    data['from'] = 'AUTO'
    data['to'] = 'AUTO'
    data['smartresult'] = 'dict'
    data['client'] = 'fanyideskweb'
    data['salt'] = '15604981263730'
    data['sign'] = 'a4ddf499a7ec36826abc283abcc828d8'
    data['ts'] = '1560498126373'
    data['bv'] = '44eca3fe61b233886c1a0e332df26d16'
    data['doctype'] = 'json'
    data['version'] = '2.1'
    data['keyfrom'] = 'fanyi.web'
    data['action'] = 'FY_BY_CLICKBUTTION'
    data['typoResult'] = 'false'
    
    #利用urlencode编码成url的形式
    data = urllib.parse.urlencode(data).encode('utf-8')
 
    req = urllib.request.Request(url,data)
    req.add_header('User-Agent','Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.112 Safari/537.36')

    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']))
    time.sleep(2)