Task 3

import random

def get_user_choice():
    """
    Function to get user's choice: 'rock', 'paper' or 'scissors'
    """
    user_choice = input("Enter your choice (rock/paper/scissors): ").strip().lower()
    while user_choice not in ['rock', 'paper', 'scissors']:
        print("Invalid choice. Please enter either 'rock', 'paper', or 'scissors'.")
        user_choice = input("Enter your choice (rock/paper/scissors): ").strip().lower()
    return user_choice

def get_computer_choice():
    """
    Function to generate computer's choice using random module
    """
    choices = ['rock', 'paper', 'scissors']
    computer_choice = random.choice(choices)
    return computer_choice

def determine_winner(user_choice, computer_choice):
    """
    Function to determine the winner between user and computer
    """
    if user_choice == computer_choice:
        return "It's a tie!"
    elif (user_choice == 'rock' and computer_choice == 'scissors') or \
         (user_choice == 'paper' and computer_choice == 'rock') or \
         (user_choice == 'scissors' and computer_choice == 'paper'):
        return "You win!"
    else:
        return "Computer wins!"

def main():
    print("Welcome to Rock, Paper, Scissors!")

    play_again = 'yes'
    while play_again == 'yes':
        user_choice = get_user_choice()
        computer_choice = get_computer_choice()

        print(f"\nYou chose: {user_choice}")
        print(f"Computer chose: {computer_choice}")

        result = determine_winner(user_choice, computer_choice)
        print(result)

        play_again = input("\nDo you want to play again? (yes/no): ").strip().lower()

    print("\nThanks for playing!")

if __name__ == "__main__":
    main()