Functional URL Manipulation in Python

gistfile1.py

from operator import attrgetter, itemgetter
from urlparse import urlparse, parse_qs

def compose(*fns):
  def _comp(f, g):
    def inner(*args, **kwargs):
      return f(g(*args, **kwargs))
    return inner
  return reduce(_comp, fns)

def embed_url(ytid):
  return "http://www.example.com/embed/{0}".format(ytid)

get_qs = attrgetter("query")
get_v = itemgetter("v")
first = itemgetter(0)

extract_qs = compose(parse_qs, get_qs, urlparse)
create_embed = compose(embed_url, first, get_v, extract_qs)

print create_embed("http://www.youtube.com/watch?v=J1j8k3cvG88")