scrapy post请求练习

import scrapy
import json

class TransferpostSpider(scrapy.Spider):
    name = 'transferPost'
    allowed_domains = ['fanyi.baidu.com']
    # start_urls = ['http://fanyi.baidu.com/']
    #   post请求不能用默认生成的，因为不能携带请求参数
    # def parse(self, response):
    #     pass

    def start_requests(self):
        url = 'https://fanyi.baidu.com/sug'
        data = {
            'kw':'final'
        }
        yield scrapy.FormRequest(url=url,formdata=data,callback=self.second_parse)

    def second_parse(self,response):
        content = response.text
        res = json.loads(content,encoding='utf-8')
        print(res)