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This, but with Perl instead of Python. Perl really has a perfect flow from one-liners to small scripts.

I use Tcl for such workflows...

Tcl has pretty much no "one liner" capability though. No -e, nor other things like -n or -p.

That's true; but not really an issue, IMHO. If I am really keen for a one-liner, then (G)awk. [edited]

I would like Tcl if it didn't had upvar.