Rock/Paper/Scissors

from random import randint
#input
print("Step right up for a game of Rock, Paper, Scissors!")
choice = input("What's yer poison? [Rock/Paper/Scissors]: ").lower()
ai_choice = randint(1,3)
#pc choice alteration
if ai_choice == 1:
    ai_choice = "rock"
elif ai_choice == 2:
    ai_choice = "paper"
elif ai_choice == 3:
    ai_choice = "scissors"
#error check
if choice != "rock" and choice != "paper" and choice != "scissors":
    print(f"{choice} is not a valid option. Get outta here!")
    quit()
#calculate winner
print(f"Player: {choice} . . . PC: {ai_choice}")
if choice == ai_choice:
    print("It's a draw! Dagnabbit.")
elif choice == 1 and ai_choice == 2:
    print("No dice! You lose.")
elif choice == 1 and ai_choice == 3:
    print("You win this round, pardner!")
elif choice == 2 and ai_choice == 1:
    print("You win this round, pardner!")
elif choice == 2 and ai_choice == 3:
    print("No dice! You lose.")
elif choice == 3 and ai_choice == 1:
    print("No dice! You lose.")
else:
    print("You win this round, pardner!")