コードの問題は、文字列の後にコンマを配置するのではなく、「紙」文字列にコンマを配置することです。紙とはさみの間にコンマがないため、コンピューターはそれらを 1 つの要素として解釈します。つまり、リストの長さは 3 ではなく 2 です。これが完全なコードです。私はそれが役立つことを願っています:
from random import choice
# getting input from the user
user_choice = input("Rock, paper or scissors? ").lower()
# printing an error message and quiting the program if the input is invalid
if user_choice != "rock" and user_choice != "paper" and user_choice != "scissors":
print("Error! Invalid answer!")
quit()
# generating the computer's choice
options = ["rock", "paper", "scissors"]
computer_choice = choice(options)
print("The computer chose", computer_choice)
# checking all of the possible options and declaring who the winner is
if user_choice == computer_choice:
print("You both chose", computer_choice, "therefore it's a tie!")
elif user_choice == "rock" and computer_choice == "paper":
print("Paper beats rock, therefore the computer won!")
elif user_choice == "paper" and computer_choice == "rock":
print("Paper beats rock, therefore you won!")
elif user_choice == "rock" and computer_choice == "scissors":
print("Rock beats scissors, therefore you won!")
elif user_choice == "scissors" and computer_choice == "rock":
print("Rock beats scissors, therefore the computer won!")
elif user_choice == "paper" and computer_choice == "scissors":
print("Scissors beats paper, therefore the computer won!")
elif user_choice == "scissors" and computer_choice == "paper":
print("Scissors beats paper, therefore you won!")