Does anyone know a package similar to this plugin?

For numpydoc there is https://github.com/douglasdavis/numpydoc.el

for neovim yes but emacs no nanis

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There's probably a way to do this with Skeleton or Tempo (they're both functionally the same, just with different DSLs). [Tempel](https://github.com/minad/tempel), too, if you want something that sets up the autotyping/snippets for you.

Check out the [docstr package](https://jcs-elpa.github.io/docstr/).

Seems pretty solid!