项目练习：百度翻译小程序

 1 # -*- coding:utf-8 -*-
 2 # Author:Sure Feng
 3 
 4 import requests
 5 import json
 6 import sys
 7 
 8 class BaiduFanyi(object):
 9     def __init__(self, trans_str):
10         self.trans_str = trans_str
11         self.lang_detect_url = "https://fanyi.baidu.com/langdetect"
12         self.trans_url = "https://fanyi.baidu.com/basetrans"
13         self.headers = {"User-Agent": "Mozilla/5.0 (Linux; Android 6.0; Nexus 5 Build/MRA58N) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Mobile Safari/537.36"}
14 
15     def parse_url(self, url, data):
16         """解析URL地址，返回响应内容(dict 格式的)"""
17         r = requests.post(url=url, data=data, headers = self.headers)
18         return json.loads(r.content.decode())  # 把Json格式的字符串转换为字典
19 
20     def get_ret(self, dict_respond):
21         """提取翻译结果"""
22         trans_ret = dict_respond["trans"][0]["dst"]
23         print("result is: ", trans_ret)
24 
25     def run(self):
26 
27         # 1 获取语言类型
28         # 1.1 准备post的URL地址，data数据
29         lang_detect_data = {"query": self.trans_str}
30         # 1.2 发送请求，获取语言类型
31         lang = self.parse_url(self.lang_detect_url, lang_detect_data)["lan"]
32         # 2 准备post请求数据
33         trans_data = {"query": self.trans_str, "from": "zh", "to": "en"} if lang == "zh" else 
34             {"query": self.trans_str, "from": "en", "to": "zh"}
35         # 3 发送请求，获取响应数据
36         dict_respond = self.parse_url(self.trans_url, trans_data)
37         # 4 提取翻译结果
38         self.get_ret(dict_respond)
39 
40 if __name__ == "__main__":
41     # trans_str = sys.argv[1]
42     trans_str = input("what would you want to translate>>>")
43     baidu_fanyi = BaiduFanyi(trans_str)
44     baidu_fanyi.run()