举例json和POST爬取百度翻译

from urllib import request,parse
import json

def fanyi(content):
    base_url = 'http://fanyi.baidu.com/sug'
    data = {
        'kw': content
    }
    data = parse.urlencode(data)
    headers = {
        'Content-Length': len(data),
        'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.146 Safari/537.36'
    }
　　 #创建请求对象,因为post请求,所有要加入headers头和data数据
    res = request.Request(base_url,data=bytes(data,encoding="utf-8"),headers=headers)
    response = request.urlopen(res)
    html = response.read()
　　 #json.loads将json格式转化成字符串类型
    result = json.loads(html)
    for item in result['data']:
        print(item['k'],item['v'])

if __name__ == "__main__":
    while True:
        content = input("请输入所需要翻译的内容:")
        if content == 'q':
            print("已关闭翻译界面!!!")
            break
        fanyi(content)