Python help thread?

Does anyone here code in Python? I for serious need some help with a number guessing game.

"In this assignment, you'll create a program that plays a simple game. The computer will generate a random integer between 1 and 20, and the user has up to three chances to guess the correct number. If the user guesses the correct number, they are informed of that. If they use all three guesses without guessing the correct number, they are told what the correct number is.

Here's a couple of examples of how the game might look (computer in blue, player in black):

1st try. Player correctly guesses the number."

Here is what I have so far:

 Spoiler

from random import randint
num = randint(1,20)
print num
def zenumbers(n):
if n != randint(1,20)
print "Guess again!"
if n != randint(1,20)
print "One more guess!"
if n != randint(1,20)
else n == randint(1,20)

I think that is correct...