Los

los.py

#!/bin/env python3

import sys,os
import random
import functools


p_sg = ['el', 'la']
p_pl = ['los', 'las']


def with_prefix(name):
	if name[-1:] == 's':
		# plural
		return random.choice(p_pl) + ' ' + name
	else:
		return random.choice(p_sg) + ' ' + name


# Find the path
path = '.'
if len(sys.argv) > 1:
	for i, p in enumerate(sys.argv[1:]):
		# ignore ls options
		if p[0] == '-':
			continue

		path = p

# handle nonexistent
if not os.path.exists(path):
	print('No such file or directory.', file=sys.stderr)
	sys.exit(1)

# is not a directory
if not os.path.isdir(path):
	print(with_prefix(os.path.basename(path)))
	sys.exit(1)


files = os.listdir(path)

# comparator
def compare(x,y):
	dirx = os.path.isdir(os.path.join(path, x))
	diry = os.path.isdir(os.path.join(path, y))

	if dirx and not diry: return -1
	if diry and not dirx: return 1
	if x < y: return -1
	if x > y: return 1
	return 0

# sort with comparator
files = os.listdir(path)
files.sort(key=functools.cmp_to_key(compare))

# print all the files
for f in files:
	withp = with_prefix(f)

	if os.path.isdir(os.path.join(path, f)):
		withp += '/'

	print(withp)