Fixing a code error

[Twoshawns]

I am currently trying to practice python So I tried making a Rock paper scissors game where the player is against a computer but I don't understand how to fix my error in the program, can anyone help?

 
import random
import time
def main():
    print("This is a rock, paper, scissor game")
    
    while answer.upper == 'Y':
        return True
    return False
play_again = True
move_list = {'Rock', 'Paper', 'Scissors'}

def rps():
    print("This is a rock, paper, scissor game")
    time.sleep(3)
    move_list = ['Rock', 'Paper', 'Scissors']
    while play_again == True:
        for comp in move_list.keys():
            user = input('What\'s your hand?: ')
            user = user.capitalize()
            comp = random.choice(list(move_list.keys()))
            if comp == 'Rock' and user == 'Paper':
                print("Computer throws " + comp + " you have thrown " + user + "!")
                print("You Win!")

            elif comp == 'Rock' and user == 'Rock':
                print("Computer throws " + comp + " you have thrown " + user + "!")
                print("It's a draw")
            
            elif comp == 'Rock' and user == 'Scissor':
                print("Computer throws " + comp + " you have thrown " + user + "!")
                print("You Lose!")

            elif comp == 'Scissor' and user == 'Paper':
                print("Computer throws " + comp + " you have thrown " + user + "!")
                print("You Lose!")

            elif comp == 'Scissor' and user == 'Rock':
                print("Computer throws " + comp + " you have thrown " + user + "!")
                print("You Lose!")

            elif comp == 'Scissor' and user == 'Scissor':
                print("Computer throws " + comp + " you have thrown " + user + "!")
                print("It's a Draw!")

            elif comp == 'Paper' and user == 'Paper':
                print("Computer throws " + comp + " you have thrown " + user + "!")
                print("It's a Draw!")

            elif comp == 'Paper' and user == 'Rock':
                print("Computer throws " + comp + " you have thrown " + user + "!")
                print("You Lose!")

            elif comp == 'Paper' and user == 'Scissor':
                print("Computer throws " + comp + " you have thrown " + user + "!")
                print("You Win!")
            else:
                print("You messed up the program dummy")

        
    answer = input("Would you like to play again?: ")


rps()
main()

Error:
Traceback (most recent call last):
  File "F:\Programing\RPS Game Practice.py", line 62, in <module>
    rps()
  File "F:\Programing\RPS Game Practice.py", line 17, in rps
    for comp in move_list.keys():
AttributeError: 'list' object has no attribute 'keys'