rock paper scissors lizard spock python POC

rpc.py

#!/usr/bin/env python3

import random

choices = ["scissors","paper","rock","lizard","spock"]
interactions = [
        [ "", "cut", "", "behead", ""],
        [ "", "", "wraps", "", "disproves"],
        [ "smashes", "", "", "crushes", ""],
        [ "", "eats", "", "", "poisons"],
        [ "smashes", "", "vaporizes", "", ""]
    ]

mychoice = random.randrange(0,len(choices))

while True:
    yourchoice_str = input("Choose one of " + ",".join(choices) + ": ").lower()
    if yourchoice_str in choices:
        break;
    print("Unrecognised input!")

yourchoice = choices.index(yourchoice_str)

diff = (mychoice - yourchoice + len(choices)) % len(choices)

print("I chose " + choices[mychoice] + ", you chose " + choices[yourchoice])
if (diff == 0):
    print("Tie.")
elif (diff % 2):
    print(choices[yourchoice] + " " + interactions[yourchoice][mychoice] + " " + choices[mychoice] + ", You win.")
else:
    print(choices[mychoice] + " " + interactions[mychoice][yourchoice] + " " + choices[yourchoice] + ", I win!")