Error trying to add +1 second of sleep for a retry

In this example I try to activate main() again in case there is an error in one():

from random import randrange
import sys
import time

def one():
    number = randrange(2)
    1/number

def main():
    try:
        one()
    except:
        sleep_time = 0
        while True:
            print('Error')
            sleep_time += 1
            print('Next attempt in: '+ str(sleep_time) + ' second(s)')
            time.sleep(sleep_time)
            main()
            sys.exit(1)

    print('Continue')

main()

When two errors occur in a row, it keeps giving a 1 second pause:

Error
Next attempt in: 1 second(s)
Error
Next attempt in: 1 second(s)
Continue

What I’m actually looking for would be an answer like this:

Error
Next attempt in: 1 second(s)
Error
Next attempt in: 2 second(s)
Continue

How should I proceed?

>Solution :

You are overwriting sleep_time back to zero with every recursive call to main Assign it as a param of the function

def main(sleep_time=0):
    try:
        one()
    except:
        while True:
            print('Error')
            sleep_time += 1
            print('Next attempt in: '+ str(sleep_time) + ' second(s)')
            time.sleep(sleep_time)
            main(sleep_time=sleep_time)
            sys.exit(1)

    print('Continue')

out

Error
Next attempt in: 1 second(s)
Error
Next attempt in: 2 second(s)
Error
Next attempt in: 3 second(s)