[Tutor] Beginner question

[Krishnan Shankar]

>def checkCave(chosenCave):
 >   print('You approach the cave...')
>    time.sleep(2)
 >   print('It is dark and spooky...')
 >   time.sleep(2)
>    print('A large dragon jumps out in front of you! He opens his jaws
and...')
>    print()
>   time.sleep(2)
>    friendlyCave = random.randint(1, 2)
 >   if chosenCave == str(friendlyCave):
 >      print('Gives you his treasure!')
 >   else:
 >       print('Gobbles you down in one bite!')
>playAgain = 'yes'
>while playAgain == 'yes' or playAgain == 'y':
>    displayIntro()
>    caveNumber = chooseCave()
>    checkCave(caveNumber)
>    print('Do you want to play again? (yes or no)')
>    playAgain = input()

Hi,

- Here we are passing the chosen integer (1 or 2) got from chooseCave()
method to checkCave as arguement
- When called in while loop inside checkCave the following happens;
    - The statements of approaching the cave and seeing the dragon are
printed with a time interval of 2 secs between each
    - Randomly either 1 or 2 is generated by the randint() method of random
module in python.
    - That randomly generated integer (1 0r 2) is compared with our integer
input (1 or 2)
    - If they match dragon gives us gold. Or else
    - We will be eaten by dragon :)

But in the code there is a flaw. input() will evaluate your user input.
i.e. If you give an integer expression it will tell the answer. And when
you provide a number it will take it as int type. See below.

>>> var = input()
1+2+3
>>> var
6
>>> var = input()
2
>>> type(var)
<type 'int'>
>>> var = input()
s
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<string>", line 1, in <module>
NameError: name 's' is not defined
>>> var = input()

So since the integer number is checked with string in Line 13, it will run
into infinite loop. If you use raw_input() instead of input() you will be
able to run the example.

Regards,
Krishnan


On Mon, Aug 12, 2013 at 10:25 PM, Jim Mooney <cybervigilante at gmail.com>wrote:

> On 12 August 2013 02:14, Karim Liateni <kliateni at gmail.com> wrote:
>
>> 5ÿt5ÿ6hhhyyyfrrtr
>>
>> eschneider92 at comcast.net a écrit :
>>
>> >I've been learning python from the website 'inventwithpython.com', and
>> I'm on a chapter that covers the following code:
>>
>
> Just a quick note - not on the algorithm itself. If you run that in some
> IDEs, such as Wing101, all the time.sleep()s will concatenate, and all the
> prints will then print at once with no delay ;')  If that happens, run it
> from the command line or try a different IDE.
>
> Jim
> --
>
> "If you don't know it's impossible, it's easier to do." --Neil Gaiman
> "The Process is not the Picture...Reality can only be proved to be
> weakly-objective. Strong objectivity is a myth." --Bernardo Kastrup
> "You cannot use logic to justify logic, so logic itself has no basis other
> than faith." --Agrippa
>
>
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