ISBN-10 in PY

Match 10-digit ISBNs, allowing optional hyphens or spaces between groups.

Pattern

\b(?:\d[\- ]?){9}[\dXx]\b   (flags: g)

Python (re) code

import re

pattern = re.compile(r"\b(?:\d[\- ]?){9}[\dXx]\b")
input_text = "0-306-40615-2"
for m in pattern.finditer(input_text):
    print(m.group(0))

Stdlib `re` module — no third-party dependency. Works on Python 3.6+.

How the pattern works

Examples

Same pattern, other engines