New to regex and I’m having difficulty putting together a regex argument for this

Question

Asked: June 11, 20262026-06-11T17:44:59+00:00 2026-06-11T17:44:59+00:00

New to regex and I’m having difficulty putting together a regex argument for this custom function re_replace in python:

{{fieldname|re_replace(pattern, replacement)}}

The pattern uses regex and I’d like to return the following id=0123456 where the fieldname follows the format below:

I’ve managed to replace the id=0123456 but haven’t been able to do the inverse. Thanks in advance.

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Editorial Team · Answer 1 · 2026-06-11T17:45:00+00:00

Editorial Team

Could you use re.search rather than your own custom function to do this?

The syntax would be:

re.search(r'id\=\d+', fieldname).group(0)      # return 'id=0123456'
re.search(r'(?<=id\=)\d+', fieldname).group(0) # return '0123456'

To do the inverse operation you could use re.sub.

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