Question

I am trying to do:

class SpiderSpider(CrawlSpider):
    name = "lolies"
    allowed_domains = ["domain.com"]
    start_urls = ['http://www.domain.com/directory/lol2']
    rules = (Rule(SgmlLinkExtractor(allow=[r'directory/lol2/\w+$']), follow=True), Rule(SgmlLinkExtractor(allow=[r'directory/lol2/\w+/\d+$']), follow=True),Rule(SgmlLinkExtractor(allow=[r'directory/lol2/\d+$']), callback=self.parse_loly))

def parse_loly(self, response):
    print 'Hi this is the loly page %s' % response.url
    return

That returns me:

NameError: name 'self' is not defined

If I change callback to callback="self.parse_loly" seems never to be called and print the URL.

But seems to be crawling the sites with no problems because I get many Crawled 200 debug messages for that rule.

What could I be doing wrong?

Thanks in advance guys!

Answer 1

It looks like the whitespace for parse_loly is not aligned correctly. Python is whitespace sensitive so to the interpreter it looks like a method outside of SpiderSpider.

You might also want to split your rules line into shorter lines as per PEP8.

Try this:

from scrapy.contrib.spiders import CrawlSpider, Rule
from scrapy.contrib.linkextractors.sgml import SgmlLinkExtractor

class SpiderSpider(CrawlSpider):
    name = "lolies"
    allowed_domains = ["domain.com"]
    start_urls = ['http://www.domain.com/directory/lol2/']
    rules = (
        Rule(SgmlLinkExtractor(allow=('\w+$', ))), 
        Rule(SgmlLinkExtractor(allow=('\w+/\d+$', ))),
        Rule(SgmlLinkExtractor(allow=('\d+$',)), callback='parse_loly'),
    )

    def parse_loly(self, response):
        print 'Hi this is the loly page %s' % response.url
        return None