#!/usr/bin/env python3

"""Mad Libs"""

import argparse

import re

import sys

# --------------------------------------------------

def get_args():

"""Get command-line arguments"""

parser = argparse.ArgumentParser(

description='Mad Libs',

formatter_class=argparse.ArgumentDefaultsHelpFormatter)

parser.add_argument('file',

metavar='FILE',

type=argparse.FileType('r'),

help='Input file')

parser.add_argument('-i',

'--inputs',

help='Inputs (for testing)',

metavar='str',

type=str,

nargs='*')

return parser.parse_args()

# --------------------------------------------------

def main():

"""Make a jazz noise here"""

args = get_args()

inputs = args.inputs

text = args.file.read().rstrip()

blanks = re.findall('(<([^<>]+)>)', text)

if not blanks:

print(f'"{args.file.name}" has no placeholders.', file=sys.stderr)

sys.exit(1)

tmpl = 'Give me {} {}: '

for placeholder, pos in blanks:

article = 'an' if pos.lower()[0] in 'aeiou' else 'a'

answer = inputs.pop(0) if inputs else input(tmpl.format(article, pos))

text = re.sub(placeholder, answer, text, count=1)

print(text)

# --------------------------------------------------

if __name__ == '__main__':

main()