more rock paper scissors

import random

print("Ready to play rock, paper, scissors?!")
print("When prompted, please select one of the three options: rock, paper, or scissors. The program will randomly pick one and will display the results")
user=raw_input("Please pick either rock, paper, or scissors")
comp=rand()
user=1

if user<comp:
    print("You lose!")
elif user>comp:
    print("You win!")
elif user==comp:
    print("Tie!")

#if user.lower()=="rock":

def rand()
	comp=random.randInt(1,3)
    return comp1

#win(user, comp2), return string user win/lose

def win(str1=str,str2=str)
	if str1=="rock":
    	if str2=="rock":
            return "Tie!"
        elif str2=="paper":
            return "You lose!"
        elif str2=="scissors":
            return "You win!"
        
 	if str1=="paper":    
    	if str2=="rock":
            return "You win!"
        elif str2=="paper":
            return "You lose!"
        elif str2=="scissors":
            return "You win!"

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