Why is nothing happening when i run this?

[Daniel Johnson]

from sys import exit
from random import randint


def main_hall():
    print "You are on the war ship. You need to get into the elevator to get to the bridge; where the General is."
    print "The whole destroyer is on alert and nearly every door is locked. There is a keypad on the elevator."
    print "There is a warning saying you only have 10 attemps, then the system deactivates and you cannot complete your mission. Be careful!"
    
    combination = "%d%d%d"  % (randint(1,9), randint(1,9), randint(1,9))

    guess = raw_input ("[Keypad:] ")

    guesses = 0

    while guess != combination and guesses < 10:
        print "*BZZT!* ERROR 2355: Incorrect combination!"
        guesses += 1
        guess = raw_input

    if guess == combination:
        print "You open the elevator and start going up, fast. When you get to the top, you are at a T-junction. Do you go left or right?"
        return 'junction'

    else:
        print "You have had more than 10 attempts! \n A small self destruct system in the lock blows you up!\n"
        return 'death'
        
        



def death():
    lols = ["NO! You have failed this mission!", "Game over kid!", "You are really bad.", "Mission over, you may aswell go home."]
    print lols(0, len(lols)-1)
    exit (1)

This is my version of a game. i am doing it for an exercise for learn python the hard way, a book tutorial.

Why does nothing happen? There are no error messages, just nothing happens.... thanks!

[Rabbit]

You never call your main_hall function.

[Daniel Johnson]

How do i do that? im not very good at python yet

[Rabbit]

By typing in the name of the function.

def hello():
    print "Hello World!"
    return

hello()