Python print scrapy spider grab tree structure method

This article illustrates the method of Python printing scrapy spider grasping tree structure. Share with you for your reference. The details are as follows:

The following code gives you a clear idea of the structure of scrapy's crawling page and makes the call very simple

#!/usr/bin/env python
import fileinput, re
from collections import defaultdict
def print_urls(allurls, referer, indent=0):
  urls = allurls[referer]
  for url in urls:
    print ' '*indent + referer
    if url in allurls:
      print_urls(allurls, url, indent+2)
def main():
  log_re = re.compile(r'<GET (.*?)> \(referer: (.*?)\)')
  allurls = defaultdict(list)
  for l in fileinput.input():
    m = log_re.search(l)
    if m:
      url, ref = m.groups()
      allurls[ref] += [url]
  print_urls(allurls, 'None')
main()

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