python returning

[Spazzymcgee]

so i have this code

Code: [Select]

import sys

import random

answer = random.randint(1,9)

guess = raw_input("What is your guess?")

if guess == answer :

    print "you win"

    sys.exit

else :

    print "you lose"
whenever it shows the "you lose" screen, i want it to return to the beginning
can someone show me how to use the "return" command
i looked online but there weren't that great of resources

[Trcx528]

Try looping

Code: [Select]

import sys
import random

answer = random.randint(1,9)
guess = raw_input("What is your guess?")

while True:
    if guess == answer :
        print "you win"
        sys.exit
    else :
    print "you lose"
    if raw_input('Replay? [Y/n]: ') != 'Y' :
        sys.exit
Try that

[Spazzymcgee]

What happens if they put y though?

[A3MIRAL]

What happens if they put y though?

that's error handling that he hasn't gotten into yet.

[Trcx528]

What happens if they put y though?

If they enter Y it loops and, otherwise it will exit. 

[A12danrulz]

What happens if they put y though?

if raw_input("Replay? [Y/n]: ") != "Y" or "y":

[C0deH4cker]

if raw_input("Replay? [Y/n]: ") != "Y" or "y":

This is better:

if raw_input("Play again? [y/N]: ").lower()[0] != "y":
    sys.exit()

[A12danrulz]

And try using exit() instead of sys.exit(). Saves importing thd sys library, though i know someone is going to correct me on this....

[C0deH4cker]

exit() is meant to be used only interactively, and is therefore bad practice to you. You sure guessed that one correctly

[C0deH4cker]

To prevent loading the sys module, do this instead:

Code: [Select]

from random import randint

num = randint(1, 9)

while 1:
    guess = input("Guess a number between 1 and 9: ")
    if guess != num:
        print("Incorrect!")
        continue
    print("Correct!")


[ghoulmaster]

To prevent loading the sys module, do this instead:

Code: [Select]

from random import randint

num = randint(1, 9)

while 1:
    guess = input("Guess a number between 1 and 9: ")
    if guess != num:
        print("Incorrect!")
        continue
    print("Correct!")


Actually since infinite loops are frowned upon this is much better:

Code: [Select]

import random

num = random.randint(1, 9)
guess = 99999999

while guess != num:
    if guess != 99999999: print("Incorrect!")
    guess = int(input("Guess a number between 1 and 9: "))

print("Correct!")

and actually a more pythonic way of doing this :

if raw_input("Play again? [y/N]: ").lower()[0] != "y":
    sys.exit()

is to do this:

Code: [Select]

if input("Play again? [y/n]: ").lower() in {"y", "yes", "yup"}:
    sys.exit()

EDIT: you all also seem to be switching from 2.x and 3.x syntax so to clear up any further confusion can the OP say what version of python he/she is using?

[C0deH4cker]

In both versions of python, print can be used like a function, so i prefer using it that way.

[ghoulmaster]

In both versions of python, print can be used like a function, so i prefer using it that way.

i was talking about the switching between input and raw_input

in 2.x you should NEVER use input() but always use raw_input() and int() that if you want a number.

in 3.x input() acts like raw_input() does in 2.x so then you always want to use input()

[h4ck3rpr0n3]

^Agreed. I always use raw_input because frankly I hate anything higher than 2.5.1 haha. Partly because that's the highest i've learned but oh well!

[C0deH4cker]

Why not use input()?