How to use exit() in Python 3

Question

import sys
import time
start = time.time()

key = input('Type your key:')
x = ('a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
     'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
     '1', '2', '3', '4', '5', '6', '7', '8', '9')

for x1 in x:
    for x2 in x:
        for x3 in x:
            y = (x1+x2+x3)
            print (y) 
            if y == key:
                print('Founded')
                exit()
done = time.time()
elapsed = done - start
print(elapsed)

The code don't stop using the exit(), the program must finish all possibilities to stop.

I do not understand your question. Note, you shouldn't use the exit function outside of the repl — juanpa.arrivillaga
– juanpa.arrivillaga, Commented Dec 6, 2019 at 0:24
This code is not indented correctly. Please also explain why you believe exit() isn't stopping the program; what is the expected output vs. actual output? — kaya3
– kaya3, Commented Dec 6, 2019 at 0:24
The code is trying to figure out the key, it figures out but keep trying until all possibilities are tried. The exit() is to stop when the key is found — Jancer Lima
– Jancer Lima, Commented Dec 6, 2019 at 0:28
Does this answer your question? Python exit commands - why so many and when should each be used? — divibisan
– divibisan, Commented Dec 6, 2019 at 0:31
Looks like you should have a function there that returns the value. — Klaus D.
– Klaus D., Commented Dec 6, 2019 at 0:33

Erik Šťastný · Accepted Answer · 2019-12-06 08:31:51Z

1

You should put it inside of function and use return with "founded" flag.

There is no reason to use of exit() for such a trivial thing.

import sys
import time

def check():
    for x1 in x:
        for x2 in x:
            for x3 in x:
                y = (x1+x2+x3)
                print (y) 
                if y == key:
                    return True
    return False


start = time.time()

key = input('Type your key:')
x = ('a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
     'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
     '1', '2', '3', '4', '5', '6', '7', '8', '9')

res = check()
if res:
    print("Found")

done = time.time()
elapsed = done - start
print(elapsed)

edited Dec 6, 2019 at 8:31

answered Dec 6, 2019 at 8:26

Erik Šťastný

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