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I haven't tried it yet, but it would depend on what sort of features you need

Python wouldn't be a good choice for cli usage

Perl is awesome to use from cli, and it is not just simple search and replace, see my tutorial[1] if you want to see examples

sed and awk are awesome on their own for cli usage, sed is meant for line oriented tasks and awk for field oriented ones (there is overlap too) - one main difference compared to perl is that their regex is BRE/ERE which is generally faster but lacks in many features like lookarounds, non-greedy, named capture groups, etc

you could check out sd[2] for a Rust implementation of sed like search and replacement (small subset of sed features)

[1] https://github.com/learnbyexample/Command-line-text-processi...

[2] https://github.com/chmln/sd




Thanks! I was mostly asking because I've found Python's regular expressions to be extremely slow compared to egrep, and Perl is in the middle. It's annoying to have to call subprocess functions in python just too launch egrep on large files.




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