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python - 如何分析一个scrapy python脚本?

转载 作者:行者123 更新时间:2023-12-04 12:57:14 24 4
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以示例脚本为例

import scrapy
from scrapy.spiders import CrawlSpider, Rule
from scrapy.linkextractors import LinkExtractor

class MySpider(CrawlSpider):
name = 'example.com'
allowed_domains = ['example.com']
start_urls = ['http://www.example.com']

rules = (
# Extract links matching 'category.php' (but not matching 'subsection.php')
# and follow links from them (since no callback means follow=True by default).
Rule(LinkExtractor(allow=('category\.php', ), deny=('subsection\.php', ))),

# Extract links matching 'item.php' and parse them with the spider's method parse_item
Rule(LinkExtractor(allow=('item\.php', )), callback='parse_item'),
)

def parse_item(self, response):
self.logger.info('Hi, this is an item page! %s', response.url)
item = scrapy.Item()
item['id'] = response.xpath('//td[@id="item_id"]/text()').re(r'ID: (\d+)')
item['name'] = response.xpath('//td[@id="item_name"]/text()').extract()
item['description'] = response.xpath('//td[@id="item_description"]/text()').extract()
return item

任何人都可以让我知道如何对这个脚本进行分析吗?

谢谢

最佳答案

这取决于您要配置文件的内容:

  • 如果是一般调试,见Debugging Spiders
  • 如果是内存占用,见Debugging memory leaks
  • 如果是爬取率等统计,见Stats Collection
  • 如果你想在运行时与蜘蛛交互,Telnet Console可能是要走的路。

  • 还有 Logging , 当然。

    关于python - 如何分析一个scrapy python脚本?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/46865284/

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