adding numbers to string representations of numbers in python

Question

I'm dealing with strings of the following form '000351'. Think of them as odometer readings. I want to increment them. For example I want to add 1 to '000345' and get '000346'.

The following python code does the job, but appears rather cumbersome. Is there a more elegant way to do this?

s='000345'
t=int(s)
t=t+1
int_to_6digit_string(t)

where the function int_to_6digit_string() is as follows

def int_to_6digit_string(i):
    if i<0 or i>999999:
        return 'argument out of bounds'
    j=str(i)
    if len(j) == 1:
        return '00000'+j
    elif len(j) == 2:
        return '0000'+j
    elif len(j) == 3:
        return '000'+j
    elif len(j) == 4:
        return '00'+j
    elif len(j) == 5:
        return '0'+j
    else:
        return j

This would be better submitted to https://codereview.stackexchange.com/ — mooseman, Nov 16 '17 at 17:04
What should happen at overflow (`s` exactly 999999)? Have you considered using `str.format()` instead? — Mast, Nov 16 '17 at 17:11
[Lots of ways](https://stackoverflow.com/questions/339007/nicest-way-to-pad-zeroes-to-string) to pad a number with 0. — Reti43, Nov 16 '17 at 17:19

score 1 · Answer 1 · answered Nov 16 '17 at 17:29

1

use string format: '{:06}'.format(your_number)

answered Nov 16 '17 at 17:29

Mehdi Pourfar

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adding numbers to string representations of numbers in python

1 Answers1