3
我跟着这两个职位的意见,我也想创建一个通用的scrapy蜘蛛:传递参数给scrapy
How to pass a user defined argument in scrapy spider
Creating a generic scrapy spider
但我发现了一个错误的变量我应该通过作为参数未定义。我是否在我的init方法中丢失了某些东西?
代码:
from scrapy.spider import BaseSpider
from scrapy.selector import HtmlXPathSelector
from data.items import DataItem
class companySpider(BaseSpider):
name = "woz"
def __init__(self, domains=""):
'''
domains is a string
'''
self.domains = domains
deny_domains = [""]
start_urls = [domains]
def parse(self, response):
hxs = HtmlXPathSelector(response)
sites = hxs.select('/html')
items = []
for site in sites:
item = DataItem()
item['text'] = site.select('text()').extract()
items.append(item)
return items
这里是我的命令行:
scrapy crawl woz -a domains="http://www.dmoz.org/Computers/Programming/Languages/Python/Books/"
这里是错误:
NameError: name 'domains' is not defined
我忘了引用变量start_urls作为self.domains,但现在的错误说自己没有定义。我有自己的问题的答案,但必须等待4个小时才能发布。未完待续... – jstaker7