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Cool, thanks @tkf ! I'll wait on those.

I gave the `--base-sysimage ...` argument a go, on 1.5.0. It seemed to crash as follows: ``` ┌ Error: Failed to monkey-patch `julia` │ exception = │ Evaluation into the...

What do you think @tkf ?

Thanks. So to efficiently build two system images, one for julia use and one for pyjulia use, the best thing would be to build a heavy base image without PyCall,...

Ended up adding a `CopyStyle` trait for safety to avoid the case of e.g. passing copy=Val(123) and hitting an unspecialized method rather than erroring.

Shall we merge this?

This could be implemented by extending / using ideas from https://github.com/JuliaArrays/EndpointRanges.jl

Did anyone have strong opinions on the best way to implement this? In particular I think it is important that it have a very simple syntax ideally similar to the...

That's an option, but it feels a bit verbose and clunky.. This is an operation I tend to use a lot in python pandas and it is thankfully very syntax-light...

Yes, exactly - I was saying that it is annoying that `begin`/`end` expansion happens at the parser level, making it inextensible. I'll look into EndpointRanges and see what can be...