Add space between Persian numeric and letter with python re

Question

I want to add space between Persian number and Persian letter like this:

"سعید123" convert to "سعید 123"

Java code of this procedure is like below.

str.replaceAll("(?<=\\p{IsDigit})(?=\\p{IsAlphabetic})", " ").

But I can't find any python solution.

Answer 1

There is a short regex which you may rely on to match boundary between letters and digits (in any language):

\d(?=[^_\d\W])|[^_\d\W](?=\d)

Live demo

Breakdown:

• \d Match a digit
• (?=[^_\d\W]) Preceding a letter from a language
• | Or
• [^_\d\W] Match a letter from a language
• (?=\d) Preceding a digit

Python:

re.sub(r'\d(?![_\d\W])|[^_\d\W](?!\D)', r'\g<0> ', str, flags = re.UNICODE)

But according to this answer, this is the right way to accomplish this task:

re.sub(r'\d(?=[آابپتثجچحخدذرزژسشصضطظعغفقکگلمنوهی])|[آابپتثجچحخدذرزژسشصضطظعغفقکگلمنوهی](?=\d)', r'\g<0> ', str,  flags = re.UNICODE)