Choose random!

# Input a number. Random choice odd or even and compare with the input. If user choose correct, he win. If not, try again.

import random


def odd_or_even():
    n = int(input('Your guest: \n'))
    random_choice = random.choice([(0, 'even'), (1, 'odd')])
    print('We choose {}'.format(random_choice[1]))
    if n % 2 == random_choice[0]:
        print('You win')
        return
    else:
        print('Try again\n------')
        odd_or_even()


Sample run:

Your guest:
2
We choose odd
Try again
------
Your guest:
3
We choose odd
You win