Python Replace the contents of a regex capture group

Asked Mar 18 '20 at 11:44

Active Mar 18 '20 at 11:52

Viewed 32 times

Given the following string: MY_VALUE=100OtherData=200

And this regex: regex = r"MY_VALUE=(?P<value>\d+)"

How can I use re.sub to replace the content of the captured group value without specyfing MY_VALUE before it, so it will result in:

MY_VALUE=200OtherData=200

edited Mar 18 '20 at 11:52

asked Mar 18 '20 at 11:44

Broshi

`re.sub(r'(MY_VALUE=)\d+', r'\g<1>200', text)` / `re.sub(r'(?<=MY_VALUE=)\d+', '200', text)` – Wiktor Stribiżew Mar 18 '20 at 11:47
g<1> means group[1] ? – Broshi Mar 18 '20 at 13:22
`\g<1>` is an *unambiguous* replacement backreference to Group 1 – Wiktor Stribiżew Mar 18 '20 at 13:22

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