Python爬虫学习之翻译小程序

import urllib.request #导入urllib.request库
import urllib.parse #导入urllib.parse库
import json #导入json库
import time #导入time库
import random #导入random库
import hashlib #导入hashlib库
url = "http://fanyi.youdao.com/translate_o?smartresult=dict&smartresult=rule" #有道翻译的网址
while True: #定义死循环
 fanyi = input("请输入想要翻译的内容:") #用户输入想要翻译的内容
 #设置API接口
 a = 'fanyideskweb'   #设置client
 b = fanyi    #需要翻译的内容
 c = str(int(time.time() * 1000)+ random.randint(1, 10)) #当前时间戳
 d = 'rY0D^0\'nM0}g5Mm1z%1G4'   #加密字符
 sign = hashlib.md5((a +b +c + d).encode('utf - 8')).hexdigest() #根据内容进行md5加密
 #设置data，按照网页审查元素设置即可
 data = {}
 data['i'] = fanyi
 data['from'] = 'AUTO'
 data['to'] = 'AUTO'
 data['smartresult'] = 'dict'
 data['client'] = 'fanyideskweb'
 data['salt'] = c
 data['sign'] = sign
 data['doctype'] = 'json'
 data['version'] = '2.1'
 data['keyform'] = 'fanyi.web'
 data['action'] = 'FY_BY_CLICKBUTTION'
 data['typoResult'] = 'true'
 data = urllib.parse.urlencode(data).encode('utf - 8') #urlencode转换data数据并编码为utf-8码
 req = urllib.request.Request(url, data)  #指定网页，包含url、data和head
 #伪造浏览器访问
 req.add_header('Referer','http://fanyi.youdao.com')
 req.add_header('User - Agent','Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36 QIHU 360SE')
 response = urllib.request.urlopen(req)  #post方式打开指定网页
 html = response.read()   #读取网页信息
 html = html.decode('utf - 8')  #将utf-8码解码为unicode码
 target = json.loads(html)   #把json页面转换为一个字典
 print("翻译结果: %s" % (target['translateResult'][0][0]['tgt'])) #输出
 time.sleep(5) #延迟提交数据