rock, paper, scissor

01_rps.py

# This is a simple Rock, Paper, Scissors game in Python
# where the computer's choice is fixed to "rock" for demonstration purposes.
#
# print, if-elif-else, input, and string comparison

computer_choice = "rock"

print('--' * 17)
print("Welcome to Rock, Paper, Scissors!")
print('--' * 17)
user_choice = input("Enter your choice (rock, paper, scissors): ")
if user_choice == computer_choice:
    print("It's a tie!")
elif user_choice == "paper":  
    print("You win!")
else:
    print("You lose!")

02_rps.py

# Use list for storing choices
#
# list, random element in list, lower()
import random

choices = ["rock", "paper", "scissors"]

print("Welcome to Rock, Paper, Scissors!")
user_choice = input("Enter your choice (rock, paper, scissors): ").lower()
computer_choice = random.choice(choices)
if user_choice == computer_choice:
    print("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"):  
    print("You win!")
else:
    print("You lose!")

print(f"Computer chose: {computer_choice}")

03_rps.py

# Use function to play the game
# function
import random

choices = ["rock", "paper", "scissors"]

def play_game(user_choice, computer_choice):
    if user_choice == computer_choice:
        print("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"):  
        print("You win!")
    else:
        print("You lose!")

print("\nWelcome to Rock, Paper, Scissors!")
print('--' * 17)
user_choice = input("Enter your choice (rock, paper, scissors): ").lower()
computer_choice = random.choice(choices)
play_game(user_choice, computer_choice)
print(f"Computer chose: {computer_choice}")

04_rps.py

# Check if user input is valid
# 
import random

choices = ["rock", "paper", "scissors"]

def play_game(user_choice, computer_choice):
    print(f"\nYou chose: {user_choice}")
    print(f"Computer chose: {computer_choice}")
    if user_choice == computer_choice:
        print("\nIt'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"):  
        print("\nYou win!")
    else:
        print("\nYou lose!")

print("\nWelcome to Rock, Paper, Scissors!")
print('--' * 17)
user_choice = input("Enter your choice (rock, paper, scissors): ").lower()
if user_choice not in choices:
    print("Invalid choice! Please choose rock, paper, or scissors.")
    exit()
computer_choice = random.choice(choices)
play_game(user_choice, computer_choice)
print("\nThanks for playing!")

05_rps.py

# Check if user input is valid
# 
import random

choices = ["rock", "paper", "scissors"]

def play_game(user_choice, computer_choice):
    print(f"\nYou chose: {user_choice}")
    print(f"Computer chose: {computer_choice}")
    if user_choice == computer_choice:
        print("\nIt'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"):  
        print("\nYou win!")
    else:
        print("\nYou lose!")

print("\nWelcome to Rock, Paper, Scissors!")
print('--' * 17)
while True:
    user_choice = input("Enter your choice (rock, paper, scissors): ").lower()
    if user_choice not in choices:
        print("Invalid choice! Please choose rock, paper, or scissors.")
        exit()
    computer_choice = random.choice(choices)
    play_game(user_choice, computer_choice)
    play_again = input("Do you want to play again? (yes/no): ").lower()
    if play_again != 'yes':
        break
print("\nThanks for playing!")