如何在一个简单的Python游戏中循环播放？

Question

I'm very new to Python but have written a simple Rock, Paper, Scissors game.

It's code is as follows:

from __future__ import print_function
import random

name = raw_input("Hi, I'm PyVa.  What is your name: ")
print('Hi',name, end='.')
yesorno = raw_input('  Would you like to play Rock, Paper, Scissors?: ')
yesorno = str(yesorno)



if yesorno == str('Yes'):
    choices = ['Rock', 'Paper', 'Scissors']
    print('Ok')
    your_choice = raw_input('Choose Rock, Paper or Scissors: ')
    print('My turn...')

    my_choice = random.choice(choices)
    print('I choose,', my_choice)
    if your_choice == my_choice:
        print('We both choose the same, it is a draw.')
    elif your_choice == 'Rock' and my_choice == 'Paper':
        print('I win!')
    elif your_choice == 'Scissors' and my_choice == 'Paper':
        print('You win!')
    elif your_choice == 'Paper' and my_choice == 'Rock':
        print('You win!')
    elif your_choice == 'Paper' and my_choice == 'Scissors':
        print('I win!')
    elif your_choice == 'Rock' and my_choice == 'Scissors':
        print('You win!')
    elif your_choice == 'Scissors' and my_choice == 'Rock':
        print('I win!')

    again = raw_input('Would you like to play again?:')

    #this is where I would like to loop to the start depending on input.



else:
    print('Ok, maybe we can play later, bye.')

Now I can imagine this isn't even remotely elegant code and that there must be more precise ways to write what I am trying to do. (Please give any pointers you have time to).

My main concern is how to correctly insert a loop for after each game ends to either return to the second block ie. the start or the game, or to simply end, based on the raw_input from the user.

Many thanks for any help you can give.

Answer 1

There you go:

from __future__ import print_function
import random

name = raw_input("Hi, I'm PyVa.  What is your name: ")
print('Hi',name, end='.')
n = 0
while True:
    if 'y' in raw_input('Would you like to play Rock, Paper, Scissors?: ').lower() or n > 0:
        my_choice = random.choice(['rock', 'paper', 'scissors'])
        print('Ok')
        your_choice = raw_input('Choose Rock, Paper or Scissors: ').lower()
        print('My turn...')
        print('I choose,', my_choice)
        if your_choice == my_choice:
            print('We both choose the same, it is a draw.')
        elif your_choice in ['rock', 'scissors'] and my_choice == 'paper':
            print('I win!')
        elif your_choice == 'paper' and my_choice in ['rock', 'scissors']:
            print('You win!')
        elif your_choice == 'rock' and my_choice == 'scissors':
            print('You win!')
        elif your_choice == 'scissors' and my_choice == 'rock':
            print('I win!')
        n += 1
        if not 'y' in raw_input('Would you like to play again?:').lower():
            break

    #this is where I would like to loop to the start depending on input.

It's also case insensitive now, kind of annoying when the game exits or you lose because you accidentally forgot to write your answer starting with a capital letter. I also simplified it a little bit using 'in'

Answer 2

I would insert the loop there:

# ...

yesorno = raw_input('  Would you like to play Rock, Paper, Scissors?: ')

while yesorno == 'Yes':
    choices = ['Rock', 'Paper', 'Scissors']

    # ...

    yesorno = raw_input('  Would you like to play Rock, Paper, Scissors?: ')

print('Ok, maybe we can play later, bye.')

Answer 3

while True:

    <your code>

    if not 'y' in raw_input('Would you like to play again?: ').lower():
        break;

Answer 4

What I'd do is to remove the unnecessary variables and instead put the actual game in a function. This allows you to call it once WITHOUT asking if the player wants to replay, and then make a while loop where the user can decide if he wants to play on. I hope this helps. I couldn't test this myself as I use Python 2.7, but aside from some potential syntax differences the code should work. I suggest something like this:

from __future__ import print_function
import random

name = raw_input("Hi, I'm PyVa.  What is your name: ")
print('Hi',name, end='.')
yesorno = raw_input('  Would you like to play Rock, Paper, Scissors?: ')
if yesorno == 'y':
    play()
def play():
        choices = ['Rock', 'Paper', 'Scissors']
        print('Ok')
        your_choice = raw_input('Choose Rock, Paper or Scissors: ')
        print('My turn...')

    my_choice = random.choice(choices)
    print('I choose,', my_choice)
    if your_choice == my_choice:
        print('We both choose the same, it is a draw.')
    elif your_choice == 'Rock' and my_choice == 'Paper':
        print('I win!')
    elif your_choice == 'Scissors' and my_choice == 'Paper':
        print('You win!')
    elif your_choice == 'Paper' and my_choice == 'Rock':
        print('You win!')
    elif your_choice == 'Paper' and my_choice == 'Scissors':
        print('I win!')
    elif your_choice == 'Rock' and my_choice == 'Scissors':
        print('You win!')
    elif your_choice == 'Scissors' and my_choice == 'Rock':
        print('I win!')
while True:
    play_again = raw_input('Play Again?(Y/N)')
    if play_again.lower() == 'y':
        play()
    elif play_again.lower() == 'n':
        print('Ok, maybe we can play later, bye.')
        break
    else:
        print('That isn\'t a valid option...')

Answer 5

I don't have time to clean it up, but here's a way you can fix your specific issue. You wrap the game within a while loop that is always true, and exit when desired.

from __future__ import print_function
import random

name = raw_input("Hi, I'm PyVa.  What is your name: ")
print('Hi',name, end='.')

yesorno = raw_input('  Would you like to play Rock, Paper, Scissors?: ')

while(1):

    yesorno = str(yesorno)

    if yesorno == str('Yes'):
        choices = ['Rock', 'Paper', 'Scissors']
        print('Ok')
        your_choice = raw_input('Choose Rock, Paper or Scissors: ')
        print('My turn...')

        my_choice = random.choice(choices)
        print('I choose,', my_choice)
        if your_choice == my_choice:
            print('We both choose the same, it is a draw.')
        elif your_choice == 'Rock' and my_choice == 'Paper':
            print('I win!')
        elif your_choice == 'Scissors' and my_choice == 'Paper':
            print('You win!')
        elif your_choice == 'Paper' and my_choice == 'Rock':
            print('You win!')
        elif your_choice == 'Paper' and my_choice == 'Scissors':
            print('I win!')
        elif your_choice == 'Rock' and my_choice == 'Scissors':
            print('You win!')
        elif your_choice == 'Scissors' and my_choice == 'Rock':
            print('I win!')

        again = raw_input('Would you like to play again? [y/n]:')

        if again is "y":
            next
        else:
            print('Thanks for playing!\n')
            exit()

    else:
        print('Ok, maybe we can play later, bye.')