Chris Pickett Chris Pickett - 1 month ago 8
Python Question

ValueError: invalid literal for int() with base 10: 'stop'

Every time I try me code it works but when I type in

'stop'
it gives me an error:


ValueError: invalid literal for int() with base 10: 'stop'


def guessingGame():
global randomNum
guessTry = 3

while True:
guess = input('Guess a Number between 1 - 10, You have 3 Tries, or Enter Stop: ')
if int(guess) == randomNum:
print('Correct')
break

if int(guess) < randomNum:
print('Too Low')
guessTry = guessTry - 1
print('You have, ' + str(guessTry) + ' Guesses Left')

if int(guess) > randomNum:
print('Too High')
guessTry = guessTry - 1
print('You have, ' + str(guessTry) + ' Guesses Left')

if guessTry == 0:
print('You have no more tries')
return

if str(guess) == 'stop' or str(guess) == 'Stop':
break

Answer

The string passed to int() should only contain digits:

>>> int("stop")
Traceback (most recent call last):
  File "<ipython-input-114-e5503af2dc1c>", line 1, in <module>
    int("stop")
ValueError: invalid literal for int() with base 10: 'stop'

A quick fix will be to use exception handling here:

def guessingGame():
    global randomNum
    global userScore
    guessTry = 3

    while True:
        guess = input('Guess a Number between 1 - 10, You have 3 Tries, or Enter Stop:  ')
        try:
            if int(guess) == randomNum:
                print('Correct')
                break

            if int(guess) < randomNum:
               print('Too Low')
               guessTry = guessTry - 1
               print('You have, ' + str(guessTry) + ' Guesses Left')

            if int(guess) > randomNum:
                print('Too High')
                guessTry = guessTry - 1
                print('You have, ' + str(guessTry) + ' Guesses Left')

            if guessTry == 0:
                print('You have no more tries')
                return
        except ValueError:
            #no need of str() here
            if guess.lower() == 'stop':
                break
guessingGame()

And you can use guess.lower() == 'stop' to match any uppercase-lowercase combination of "stop":

>>> "Stop".lower() == "stop"
True
>>> "SToP".lower() == "stop"
True
>>> "sTOp".lower() == "stop"
True
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