Python Exercise 4

Rock Paper Scissors Lizard Spock

Rock Paper Scissors Lizard Spock is a variation of the common game Rock Paper Scissors that is

often used to pass time (or sometimes to make decisions.) The rules of the game are outlined

below:

Scissors cuts Paper

Paper covers Rock

Rock crushes Lizard

Lizard poisons Spock

Spock smashes Scissors

Scissors decapitates Lizard

Lizard eats Paper

Paper disproves Spock

Spock vaporizes Rock

Rock crushes Scissors

Write a program that simulates the game of Rock Paper Scissors Lizard Spock!

The user should be able to enter strings for each of their choices (e.g. Rock for Rock,

Paper for Paper etc).

o The code should also ensure that the user only enters the strings Rock, Paper,

Scissors, Lizard or Spock (they should be able to enter upper, lower, title or

alternate versions as long as it correctly spells the proper choice).

Use upper lower or title methods to convert the entry into one format.

This makes it easier to compare choices

Store the possible choices in a list. The computer should randomly select one of the

options from the list using the choice method

The program should then determine the winner using carefully constructed selection

statements

o You can nest if-elif-else within other if-elif-else constructs or you logical

operators to combine conditions statements. Whatever method you choose, be

consistent and thorough!

o Python allows the use of relational operators for strings. Just make sure the case

is consistent

The game should be played as many times as the user wants.

o To craft this, you can use an infinite while loop to start the game (ensuring that

the game will be played at least once) and a break statement to stop playing

o After every game, the program should ask if the user wants to play again. The

user should enter yes or no to stop the game

If yes is entered, a break statement should stop the loop

If no is entered, the game continues

The only acceptable responses are yes and no. If any other responses are

entered, the user should be prompted to enter yes or no (using input

validation). All versions of yes or no (upper, lower, title, etc) should be

accepted.

The program should keep track of:

o The number of games played

o Number of ties

o Number of times the player wins

o Number of times the computer wins

Here is a sample of the solution:

Let's play Rock, Paper, Scissors, Lizard, Spock!

Enter your choice: towel

That's invalid. Please enter Rock, Paper, Scissors, Lizard or Spock: rock

Computer chose Paper

Paper covers Rock! Computer wins!

Play again? (yes/no): yeah

Invalid response. Play again? Enter yes or no only: yes

Let's play Rock, Paper, Scissors, Lizard, Spock!

Enter your choice: paper

Computer chose Lizard

Lizard eats Paper! Computer wins!

Play again? (yes/no): yes

Let's play Rock, Paper, Scissors, Lizard, Spock!

Enter your choice: Scissors

Computer chose Spock

Spock smashes Scissors! Computer wins!

Play again? (yes/no): nah

Invalid response. Play again? Enter yes or no only: no

Number of games played: 0

Games you won: 0

Games the computer won: 3

Tie games: 0

Thanks for playing!

Tip:

This code requires careful planning. Analyze all the possible ways the player or

computer can win and create an outline. (The navigator should take the lead on creating

an outline to ensure that the driver is appropriately guided for this assignment.)