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NodeJS allows this as well. I think this is pretty much a must-have feature for any serious dynamic language. Edit: A must have for any prolific dynamic langua

• dragonwriter 5y ago
  > But now I’m not sure that’s true, because even though it apparently works in Python, it’s certainly not widely used. I mean, it is used—even in the standard library—but often for alternative packaging (e.g., loading python modules in zip files) rather than alternative languages. It may be used less prominently than in Node, but it definitely is used for a variety of things.
• aasasd 5y ago
  It's pretty much the exact feature that's behind the saying that ‘to parse Perl you must have the Perl interpreter’. Because Perl allows some kind of language/imports handlers, as exhibited by tricks like Lingua::Romana::Perligata.