Do you even code bro?

gistfile1.py

import urlparse
import collections

def tree():
  return collections.defaultdict(tree)

urls = (l.strip() for l in open('urls.txt') if len(l.strip()))
data = tree()

for url in urls:
  parsed = urlparse.urlparse(url)
  data[parsed.path][parsed.netloc] = url

for path, urls in data.items():
  print path, urls.values()