How to add +1 to a String that contains letters?

Question

For example, if I want to + 1 to the string 'TB004' so it becomes 'TB005'?

To complicate things, the last two digits of 'TB004' must not exceed '12'. once they exceed 12, the last two digits should restart from 00

This is to be looped:

for i in range(25):
    #Add 1 to the end of 'TB004', do not exceed 12 as the last two digits, 
    #when you do, restart string with 00 as final numbers.

I have not tried anything yet, I have no clue where to start — Alex, May 02 '17 at 05:38
read about string slicing http://stackoverflow.com/questions/1010961/string-slicing-python — JkShaw, May 02 '17 at 05:42
ideally, yes. the last two digits should never exceed 12. when they exceed 12, the numbers should become 00 again. — Alex, May 02 '17 at 05:48
You can get the last 2 digits from the string and +1 to that. — Harsheet, May 02 '17 at 06:29

RomanPerekhrest · Answer 1 · 2017-05-02T06:07:08.750

1

Use the following approach:

s = 'TB011'
ld = int(s[-2:]) + 1
s = '%3s%02d' % (s[:-2], ld if ld <= 12 else 0)

print(s)   # TB012

edited May 02 '17 at 06:07

answered May 02 '17 at 05:40

RomanPerekhrest

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But what if the input string is `TB009`? – kuro May 02 '17 at 05:42
@kuro, it'll be `TB0010`, so? – RomanPerekhrest May 02 '17 at 05:43
Or should it be `TB010`? The OP can clarify that – kuro May 02 '17 at 05:43
I think we can also split this into a list and if elements in list are ints, to add a number to it – Alex May 02 '17 at 05:44
@kuro, I've added comment – RomanPerekhrest May 02 '17 at 05:44
pythonista solution GREAT – Tara Prasad Gurung May 02 '17 at 05:53

Tara Prasad Gurung · Accepted Answer · 2017-05-02T06:08:05.797

0

stringhere="TB004"

for i in range(25):
    numberonly=stringhere[2:]
    intointeger=int(numberonly)+1
    if intointeger==12:
        stringhere="TB000"
    else:
        stringhere="TB"+"%03d"%intointeger

    print stringhere

edited May 02 '17 at 06:08

answered May 02 '17 at 05:52

Tara Prasad Gurung

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You missed the `should not exceed 12` part – kuro May 02 '17 at 05:55
great!! now how about with the complications I threw into my question? – Alex May 02 '17 at 05:56
` stringhere="TB004" for i in range(25): numberonly=stringhere[2:] intointeger=int(numberonly)+1 if intointeger==12: stringhere="TB000" else: stringhere="TB"+"%03d"%intointeger print stringhere` if this is what you want – Tara Prasad Gurung May 02 '17 at 06:07

How to add +1 to a String that contains letters?

2 Answers2