Why am I getting "NameError" from input()? [duplicate]

Question

I am new and trying to create a simple "guess the number game":

import random
class Randgame :

    def __init__(self):
        pass

    def restart(self):
        response = input("Type Yes To Play Again!").lower()
        if response == "yes":
            self.play()
        else:
            print("Thanks for playing!")
            pass

    def play(self):
        guess = int(input("What's your guess?"))
        num = random.randint(0, 10)

        if guess == num:
            print("Correct!")
        else:
            print("Nope!")
        self.restart()


fun = Randgame()

fun.play()

All is well until I get to the restart() method. If I type "yes" into the console I get this response:

NameError: name 'yes' is not defined

I cannot figure this out to save my life and I don't know what to look up. Please help!

In Python 2.x, input() accepted Python expressions, rather than strings. If for some strange reason you cannot upgrade to a Python version that's actually still supported, you need to replace it with raw_input() everywhere you use it. — jasonharper
– jasonharper, Commented Apr 13, 2021 at 0:00

Luke B · Accepted Answer · 2021-11-12 21:17:01Z

1

In Python 2, getting input as plain text is done via raw_input instead of input. Python 3 changed the name of the function to input. The Python 2 version of input does eval(raw_input(prompt)), so it is trying to actually access a variable called yes, when you just want to get the string "yes".

Python 2 Docs

edited Nov 12, 2021 at 21:17

answered Apr 13, 2021 at 0:01

Luke B

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