[Python] regex to match uuid4 not working with f-string

Working:

#!/usr/bin/python3

import re

path = "/a/b/c/e72cc82c-e83a-431c-9f63-c8d80eec9307"

if re.match(r"/a/b/c/[a-f0-9]{8}-[a-f0-9]{4}-4[a-f0-9]{3}-[89aAbB][a-f0-9]{3}-[a-f0-9]{12}$", path):
print("matched")
else:
print("didn't match anything")


Failing:

#!/usr/bin/python3

import re

PATH_PREFIX = "/a/b/c"
path = "/a/b/c/e72cc82c-e83a-431c-9f63-c8d80eec9307"

if re.match(rf"{PATH_PREFIX}/[a-f0-9]{8}-[a-f0-9]{4}-4[a-f0-9]{3}-[89aAbB][a-f0-9]{3}-[a-f0-9]{12}$", path):
print("matched")
else:
print("didn't match anything")


I used the f-string in python regex a few years ago, and it was working. Not sure why it is failing now.

Continue reading...