Adding string after every 3rd charater [SOLVED]

[ibreeden]

If (which I think will be the case) this is too complex and there is a far easier method, please let me know :)

Congratulations, well done. But indeed there is an easier method: use an f-string and mark the type as "n" (number). But then you need to set the locale of your environment. (Not sure if this works also with Windows.)

PyDev console: starting.
Python 3.9.5 (default, Nov 23 2021, 15:27:38) 
[GCC 9.3.0] on linux

import locale
locale.setlocale(locale.LC_ALL, '')  # Get the locale from your OS
'nl_NL.UTF-8'
aa = 1234567890
print(f"{aa:n}")
1.234.567.890