python爬虫入门笔记--post百度翻译

import urllib.request
import urllib.parse

#创建url
#地址一定要写对
url = 'http://fanyi.youdao.com/translate_o?smartresult=dict&smartresult=rule  '

form_data = {
    'action':  'FY_BY_REALTlME',
    'bv':  '316dd52438d41a1d675c1d848edf4877',
    'client'   :'fanyideskweb',
    'doctype': 'json',
    'from' :'AUTO',
    'i':   'baby',
    'keyfrom'  :'fanyi.web',
    'salt' :'15583529043199',
    'sign':    '50854f3e3b8180d97371281ac0f7f851',#一个单词对应一个sign和ts
    'smartresult'  :'dict',
    'to'   :'AUTO',
    'ts'   :'1558352904319',
    'version': '2.1',
}
headers = {
    'Host': 'fanyi.youdao.com',
    'Connection': 'keep-alive',
    'Content-Length':'237',
    'Accept': 'application/json, text/javascript, */*; q=0.01',
    'Origin': 'http://fanyi.youdao.com',
    'X-Requested-With':'XMLHttpRequest',
    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.131 Safari/537.36',
    'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8',
    'Referer': 'http://fanyi.youdao.com/',
  # 'Accept-Encoding': 'gzip, deflate',
    'Accept-Language': 'zh-CN,zh;q=0.9',
    'Cookie': 'OUTFOX_SEARCH_USER_ID=-181098280@10.169.0.84; JSESSIONID=aaaKiWEaDPtbXcudjevRw; OUTFOX_SEARCH_USER_ID_NCOO=2076851833.794606; ___rl__test__cookies=1558352904316',

}
#构建请求对象
request=urllib.request.Request(url=url,headers=headers)
#处理表单数据
form_data=urllib.parse.urlencode(form_data).encode()
#发送请求
response = urllib.request.urlopen(request,data=form_data)
print(response.read().decode())

输出：{"translateResult":[[{"tgt":"婴儿","src":"baby"}]],"errorCode":0,"type":"en2zh-CHS","smartResult":{"entries":["","n. 婴儿，婴孩；孩子气的人 ","adj. 婴儿的；幼小的 ","vt. 纵容，娇纵；把……当婴儿般对待 "],"type":1}}

最后通过json解析得出：

{
    "translateResult":[
        [
            {
                "tgt":"婴儿",
                "src":"baby"
            }
        ]
    ],
    "errorCode":0,
    "type":"en2zh-CHS",
    "smartResult":{
        "entries":[
            "",
            "n. 婴儿，婴孩；孩子气的人 ",
            "adj. 婴儿的；幼小的 ",
            "vt. 纵容，娇纵；把……当婴儿般对待 "
        ],
        "type":1
    }
}