The 12 days of Christmas in code

Christmas_gist_12_days.py

presents = {
    1: 'A partridge in a pear tree',
    2: 'Two turtle doves',
    3: 'Three french hens',
    4: 'Four calling birds',
    5: 'Five golden rings',
    6: 'Six geese a-laying',
    7: 'Seven swans a-swimming',
    8: 'Eight maids a-milking',
    9: 'Nine ladies dancing',
    10: 'Ten lords a-leaping',
    11: 'Eleven pipers piping',
    12: 'Twelve drummers drumming',
}

def ordinal(n): return "%d%s" % (n, "tsnrhtdd"[(n//10 % 10 != 1)*(n % 10 < 4) * n % 10 ::4])


def stem(day): return f'On the {ordinal(day)} day of Christmas, my true love gave to me: '


def presents_day(day):
    return ('and ' + presents[1] + '.' if day <= 1
            else presents[day] + '; ' + presents_day(day-1)).lower()


for day in range(1, 13):
    song_line = stem(day) + presents_day(day)
    print(song_line.replace(' and ', ' ')) if day == 1 else print(song_line)