How to replace some numbers with other in from one line?

January 12, 2022

I have line include some numbers with underscore like this

1_0_1_A2C_1A_2BE_DCAAFFC_0_0_0

I need code to check (DCAAFFC) and if the last 4 numbers not (0000) then the code should be replacing (0000) in place of last 4 numbers (AFFC) like this (DCA0000)
So should be line become like this

1_0_1_A2C_1A_2BE_DCA0000_0_0_0

I need code work on python2 and 3 please !!

P.S the code of (DCAAFFC) is not stander always changing.

>Solution :

Try regular expressions i.e:

import re

old_string = '1_0_1_A2C_1A_2BE_DCAAFFC_0_0_0'
match = re.search('_([a-zA-Z]{7})_', old_string)
span = match.span()
new_string = old_string[:span[0]+4] + '0000_' + old_string[span[1]:]
print(new_string)