Scrapy 在嵌套的 json 对象中运行循环

Question

我正在使用 scrapy 抓取 json api 并希望循环浏览报价，然后遍历结果，如下面的屏幕截图所示。 我得到了好的报价，但不确定要为 get() 写什么，因为它没有标签。 我尝试过的所有操作都会导致“列表”错误 object has no attribute get。

我的代码如下：

import scrapy
import json

class DkSpider(scrapy.Spider):
    name = 'dk'
    allowed_domains = ['sportsbook.draftkings.com']
    start_urls = ['https://sportsbook.draftkings.com//sites/US-SB/api/v4/eventgroups/88670846/categories/583/subcategories/4991']

    def parse(self, response):
        items = json.loads(response.body)
        cats = items.get('eventGroup').get('offerCategories')

        for cat in cats:
            groups = str(cat.get('name'))

            if groups == "Player Props":
                subcats = cat.get('offerSubcategoryDescriptors')

                for subcat in subcats:
                    markets = str(subcat.get('name'))

                    if markets == "Points":
                        games = subcat.get('offerSubcategory').get('offers')

                        for game in games:
                            outcomes = game.get('outcomes')

  

Answer 1

如果for game in games[0]:编写一个空白条目，但由于您有多个空白键，那么您需要遍历它们以获取所需的所有信息。

用你的方法解决：

import scrapy


class DkSpider(scrapy.Spider):
    name = 'dk'
    allowed_domains = ['sportsbook.draftkings.com']
    start_urls = ['https://sportsbook.draftkings.com//sites/US-SB/api/v4/eventgroups/88670846/categories/583/subcategories/4991']

    def parse(self, response):
        items = response.json()
        cats = items.get('eventGroup').get('offerCategories')

        for cat in cats:
            groups = str(cat.get('name'))

            if groups == "Player Props":
                subcats = cat.get('offerSubcategoryDescriptors')

                for subcat in subcats:
                    markets = str(subcat.get('name'))

                    if markets == "Points":
                        games = subcat.get('offerSubcategory').get('offers')

                        for game in games:
                            for in_game in game:
                                outcomes = in_game.get('outcomes')
                                for outcome in outcomes:
                                    print(outcome['participant'])

但请注意，您执行的迭代次数比实际需要的要多，因此运行时间会更长。 要么休息一下，要么做这样的事情：

import scrapy
import json


class DkSpider(scrapy.Spider):
    name = 'dk'
    allowed_domains = ['sportsbook.draftkings.com']
    start_urls = ['https://sportsbook.draftkings.com//sites/US-SB/api/v4/eventgroups/88670846/categories/583/subcategories/4991']

    def parse(self, response):
        # from scrapy.shell import inspect_response
        # inspect_response(response, self)
        games = json.loads(response.body)['eventGroup']['offerCategories'][1]['offerSubcategoryDescriptors'][1]['offerSubcategory']['offers']
        for game in games:
            for in_game in game:
                outcomes = in_game.get('outcomes')
                for outcome in outcomes:
                    # Get whatever info you want here
                    print(outcome['participant'])