python - How does pyspider pass information to the next function, but not through the url

Question

Sometimes it is necessary to pass information directly to the next function through pyspider, but there is no need to cral a new URL. For example, a certain part of the information on a list page needs to be passed to the next function, but you do not want to pass it through the URL of the list. I thought about using the send_message method, and then...

ringa_lee · Answer

The next function has finished executing and it no longer exists. How do you pass information to something that does not exist?

曾经蜡笔没有小新 · Answer

It’s nothing more than a jump callback, and the data that has come out yields, but you should still test it.

def detail(self, response):
    next_urls = [i.attr.href for i in response.doc('#fetch urls')]
    for url in next_urls:
        self.crawl(url, callback=self.list_page)
    for i in items = [
        # some result    
    ]
        yield i