from source import Source from scrapy import log from scrapy.http import Request from scrapy.selector import Selector from FourmiCrawler.items import Result class NIST(Source): website = "http://webbook.nist.gov/*" def __init__(self): Source.__init__(self) def parse(self, reponse): pass def new_compound_request(self, compound): # return Request(url=self.website[:-1] + compound, callback=self.parse) pass