Insomniac

Here is an example code:

months = [
'January',
'February',
'March',
'April',
'May',
'June',
'July',
'August',
'September',
'October',
'November',
'December',
]

# A list with one ending for each number from 1 to 31
endings = ['st', 'nd', 'rd'] +17 * ['th']\
+ ['st', 'nd', 'rd'] +7 * ['th']\
+ ['st']

year = raw_input('Year: ')
month = raw_input('Month(1-12): ')
day = raw_input('Day(1-31): ')

month_name = months[int(month)-1]
ordinal = day + endings[int(day)-1]

print month_name + ' ' + ordinal + ', ' + year


Now, this program came out fine due to it being an example in my book.
Even when I went to create my own more simplified version, I did fine.

But, can you explain how Python or the computer for that matter reads where it says 'endings' and is able to properly assign the correct ending for a specific day?

I left this portion out of my personal program because it confused the hell out me and also because the book left this detailed part out.
That's number 1, number 2 is -is 'ordinal' simply a variable or a function because the book didn't say. I tried adding 'ordinal' to my program and it wouldn't accept it.

Please help, Thank you.

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