You are going to act as a Python interpreter. You will be given a valid python program below. Write down what you think the result of its execution would be. Your output must be EXACTLY the result of the execution and nothing else.
situation
system
import argparse
import collections
import re
import subprocess


NOTES_REF = 'refs/notes/votes'


Vote = collections.namedtuple('Vote', ['commit', 'user'])



def vote(args):
	assert args.user, 'TODO: determine user automatically'
	vote = 'vote:%s' % args.user
	subprocess.check_call([
		'git', 'notes', '--ref', NOTES_REF, 'append', '--allow-empty', '-m', vote, args.COMMIT],
		cwd=args.repo_dir)
	# TODO: prevent voting twice as same user


def get_all_votes(repo_dir):
	output_bytes = subprocess.check_output([
		'git', 'notes', '--ref', NOTES_REF, 'list'],
		cwd=repo_dir)
	output = output_bytes.decode('utf-8')
	for line in output.splitlines():
		if not line:
			continue
		votenote_ref, commit_id = line.split()
		# TODO use dulwich or something more efficient here
		votenote_bytes = subprocess.check_output(
			['git', 'show', votenote_ref],
			cwd=repo_dir)

		votenote_content = votenote_bytes.decode('utf-8') # TODO ignore invalid votes
		for voteline in votenote_content.splitlines():
			if not voteline:
				continue
			m = re.match(r'^vote:(?P<user>[a-z0-9@._]+)$', voteline.strip()) # TODO check re for user spec
			if not m:
				print('Skipping crap %r' % voteline)
				continue
			user = m.group('user')

			yield Vote(commit=commit_id, user=user)


def print_list(args):
	all_votes = get_all_votes(args.repo_dir)
	all_votes_sorted = sorted(all_votes, key=lambda v: (v.commit, v.user))
	for v in all_votes_sorted:
		print('%s: +1 from %s' % (v.commit, v.user))


def tally(all_votes):
	""" Returns a dict commit id => set of users """
	res = collections.defaultdict(set)
	for v in all_votes:
		res[v.commit].add(v.user)
	return res


def print_tally(args):
	all_votes = get_all_votes(args.repo_dir)
	for commit, votes in sorted(tally(all_votes).items(), key=lambda kv: (kv[1], kv[0])):
		print('%s: %d votes' % (commit, len(votes)))


def print_elect(args):
	all_votes = get_all_votes(args.repo_dir)
	winner_vcount, winner_commit = max((len(votes), commit) for commit, votes in tally(all_votes).items())
	# TODO more algorithms
	print('%s won the election with %d votes' % (winner_commit, winner_vcount))


def main():
	parser = argparse.ArgumentParser('Vote on git commands')
	parser.add_argument('-r', '--repo-dir', metavar='DIR', help='root directory of the repository to modify')
	subparsers = parser.add_subparsers(dest='cmd')
	vote_parser = subparsers.add_parser('vote', help='Vote for commit')
	vote_parser.add_argument('--user', metavar='USER_ID', help='ID of the user to vote as')
	vote_parser.add_argument('COMMIT', help='reference to the commit to vote for')
	subparsers.add_parser('list', help='List all votes')
	subparsers.add_parser('tally', help='Tally all votes')
	subparsers.add_parser('elect', help='Elect a commit')

	args = parser.parse_args()
	if args.cmd == 'vote':
		vote(args)
	elif args.cmd == 'list':
		print_list(args)
	elif args.cmd == 'tally':
		print_tally(args)
	elif args.cmd == 'elect':
		print_elect(args)
	else:
		parser.print_help()

if __name__ == '__main__':
	main()

user
usage: Vote on git commands [-h] [-r DIR] {vote,list,tally,elect} ...

positional arguments:
  {vote,list,tally,elect}
    vote                Vote for commit
    list                List all votes
    tally               Tally all votes
    elect               Elect a commit

optional arguments:
  -h, --help            show this help message and exit
  -r DIR, --repo-dir DIR
                        root directory of the repository to modify
assistant