Slack User Mention in PY

Match Slack user mentions in their raw form <@U01234ABC> as delivered by the Events API.

Pattern

<@U[A-Z0-9]{8,}>   (flags: g)

Python (re) code

import re

pattern = re.compile(r"<@U[A-Z0-9]{8,}>")
input_text = "cc <@U01234ABC> please review"
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