我有一个项目将填充每个解析函数。我想在解析完成后返回更新的项目。这是我的情景:修改多个解析函数中的项目并返回更新的项目?
我的项目类:
class MyItem(Item):
name = Field()
links1 = Field()
links2 = Field()
我有多个网址,登录后抓取:
在解析功能,我这样做:
for url in urls:
yield Request(url=url, callback=self.get_info)
在get_info,我将在每个响应中提取“名称”和“链接”:
item = MyItem()
item['name'] = hxs.select("//title/text()").extract()
links = []
link = {}
for data in json_parsed_from_response:
link['name'] = data.get('name')
link['url'] = data.get('url')
links.append(link)
item['links1] = links
#similarly, item['links2'] is created.
现在,我想通过每个网址的每个项目[“links1]和项目[” links2' ]作为(这些循环是内部的get_info):
for link in item['links1']:
request = Request(url= link['url'], callback=self.get_status)
request.meta['link'] = link
yield request
for link in item['links2']:
request = Request(url= link['url'], callback=self.get_status)
request.meta['link'] = link
yield request
# Where do I return item, can't return item inside generator
def get_status(self, response):
link = response.meta['link']
if "good" in response.body:
link['status'] = 'good'
else:
link['status'] = 'bad'
# Changes made here, will be reflected in item?
# Also, I can't return item from here. Multiple items will be returned.
我不能找出item
必须返回的位置,它应该包含所有更新的数据。
你在哪里创建“项目”本身?你在哪里创建“MyItem”?你能显示整个代码吗? –
它在get_info中。对不起,不能发布代码,其大。我已经发布确切的情况。 – rajpy