Scrapy 如何像 requests 一样使用 params 传参

# -*- coding: utf-8 -*-
import json

import scrapy


class HuoBiSpider(scrapy.Spider):
    name = 'huobi'
    allowed_domains = ['otc-api-bj.eiijo.cn']

    def start_requests(self):
        yield scrapy.FormRequest(url='https://otc-api-bj.eiijo.cn/v1/data/trade-market',
                                 formdata={'coinId': '3', 'currency': '1', 'tradeType': 'sell', 'currPage': '1',
                                           'payMethod': '0', 'country': '37', 'blockType': 'general', 'online': '1',
                                           'range': '0', 'amount': ''}, method='GET')

    def parse(self, response):
        response = json.loads(response.text)
        print(response)


if __name__ == '__main__':
    from scrapy import cmdline

    cmdline.execute("scrapy crawl huobi".split())