Structured display for Julia objects

pauljurczak · June 4, 2020, 12:20am

I find the structured display for arbitrary objects in Juno very convenient:

Is there anything similar available for VS Code plugin, Jupyter notebooks or any other Julia IDE? I know about Base.dump, but I prefer a GUI equivalent.

On that note, why Juno displays im structure as a Vector (see above), while REPL shows:

julia> typeof(im)
Array{MessageData{RobotOSData.CommonMsgs.sensor_msgs.Image},1}

I know that Vector{T} is equivalent to Array{T,1}, which makes Juno’s choice of visualization easier to read.

pfitzseb · June 4, 2020, 9:14am

Is there anything similar available for VS Code plugin, Jupyter notebooks or any other Julia IDE? I know about Base.dump , but I prefer a GUI equivalent.

Kinda:

REPLTreeViews.jl provides a TUI, but that package needs a bit of love before I’d really recommend it.

We’ll also implement structured display for the VSCode workspace soon.

On that note, why Juno displays im structure as a Vector

Because it’s easier to read
There are some efforts underway for Base at

github.com/JuliaLang/julia

RFC: print Array{T,1} as Vector{T} and Array{T,2} as Matrix{T}

JuliaLang:master ← JuliaLang:kc/matrix_vector

opened 11:22AM - 26 May 20 UTC

KristofferC

+1054 -1047

Personally I find this clearer, especially when types are nested. As an examp…le ``` 1-element Array{Union{X28004, Array{T,1} where T},1}:\n X(Any[X(1)]) ``` vs ``` 1-element Vector{Union{X28004, Vector{T} where T}}:\n X(Any[X(1)]) ``` Some potential objections: - How about the other array types, `AbstractVector`, `DenseVector` etc? Could also be special cased imo. - Could potentially hide that `Vector{T}` is just another name for `Array{T, 1}`. - I feel this is something you learn pretty quickly and the convenience in printing makes up for the slight "pedagogical" issue.

and

github.com/JuliaLang/julia

RFC: print all types using equivalent exported aliases

JuliaLang:master ← JuliaLang:jn/show-typealiases

opened 07:19PM - 01 Jun 20 UTC

vtjnash

+1428 -1201

Given triage's interest in https://github.com/JuliaLang/julia/pull/36032, this w…orks to generalize those printing improvements to all types. While type-intersection failures can be rather unexpected (i.e. handling difficult cases, but not simplifications of them), it often does much better than master anyways: ```julia julia> T = Union{Nothing, StridedVector{S}} where S Union{Nothing, StridedArray{S,1}} where S julia> T = Union{Nothing, StridedVecOrMat{S}} where S<:Integer Union{Nothing, StridedMatrix{S}, StridedVector{S}} where S<:Integer julia> T = Union{Nothing, StridedVecOrMat{S}, S} where S<:Integer Union{Nothing, S, StridedMatrix{S}, StridedVector{S}} where S<:Integer julia> StridedVecOrMat StridedVecOrMat{T} where T = Union{DenseArray{T,1}, DenseArray{T,2}, Base.ReinterpretArray{T,1,S,A} where S where A<:Union{SubArray{T,N,A,I,true} where I<:Union{Tuple{Vararg{Real,N} where N}, Tuple{AbstractUnitRange,Vararg{Any,N} where N}} where A<:DenseArray where N where T, DenseArray}, Base.ReinterpretArray{T,2,S,A} where S where A<:Union{SubArray{T,N,A,I,true} where I<:Union{Tuple{Vararg{Real,N} where N}, Tuple{AbstractUnitRange,Vararg{Any,N} where N}} where A<:DenseArray where N where T, DenseArray}, Base.ReshapedArray{T,1,A,MI} where MI<:Tuple{Vararg{Base.MultiplicativeInverses.SignedMultiplicativeInverse{Int64},N} where N} where A<:Union{Base.ReinterpretArray{T,N,S,A} where S where A<:Union{SubArray{T,N,A,I,true} where I<:Union{Tuple{Vararg{Real,N} where N}, Tuple{AbstractUnitRange,Vararg{Any,N} where N}} where A<:DenseArray where N where T, DenseArray} where N where T, SubArray{T,N,A,I,true} where I<:Union{Tuple{Vararg{Real,N} where N}, Tuple{AbstractUnitRange,Vararg{Any,N} where N}} where A<:DenseArray where N where T, DenseArray}, Base.ReshapedArray{T,2,A,MI} where MI<:Tuple{Vararg{Base.MultiplicativeInverses.SignedMultiplicativeInverse{Int64},N} where N} where A<:Union{Base.ReinterpretArray{T,N,S,A} where S where A<:Union{SubArray{T,N,A,I,true} where I<:Union{Tuple{Vararg{Real,N} where N}, Tuple{AbstractUnitRange,Vararg{Any,N} where N}} where A<:DenseArray where N where T, DenseArray} where N where T, SubArray{T,N,A,I,true} where I<:Union{Tuple{Vararg{Real,N} where N}, Tuple{AbstractUnitRange,Vararg{Any,N} where N}} where A<:DenseArray where N where T, DenseArray}, SubArray{T,1,A,I,L} where L where I<:Tuple{Vararg{Union{Int64, AbstractRange{Int64}, Base.AbstractCartesianIndex, Base.ReshapedArray{T,N,A,Tuple{}} where A<:AbstractUnitRange where N where T},N} where N} where A<:Union{Base.ReinterpretArray{T,N,S,A} where S where A<:Union{SubArray{T,N,A,I,true} where I<:Union{Tuple{Vararg{Real,N} where N}, Tuple{AbstractUnitRange,Vararg{Any,N} where N}} where A<:DenseArray where N where T, DenseArray} where N where T, Base.ReshapedArray{T,N,A,MI} where MI<:Tuple{Vararg{Base.MultiplicativeInverses.SignedMultiplicativeInverse{Int64},N} where N} where A<:Union{Base.ReinterpretArray{T,N,S,A} where S where A<:Union{SubArray{T,N,A,I,true} where I<:Union{Tuple{Vararg{Real,N} where N}, Tuple{AbstractUnitRange,Vararg{Any,N} where N}} where A<:DenseArray where N where T, DenseArray} where N where T, SubArray{T,N,A,I,true} where I<:Union{Tuple{Vararg{Real,N} where N}, Tuple{AbstractUnitRange,Vararg{Any,N} where N}} where A<:DenseArray where N where T, DenseArray} where N where T, DenseArray}, SubArray{T,2,A,I,L} where L where I<:Tuple{Vararg{Union{Int64, AbstractRange{Int64}, Base.AbstractCartesianIndex, Base.ReshapedArray{T,N,A,Tuple{}} where A<:AbstractUnitRange where N where T},N} where N} where A<:Union{Base.ReinterpretArray{T,N,S,A} where S where A<:Union{SubArray{T,N,A,I,true} where I<:Union{Tuple{Vararg{Real,N} where N}, Tuple{AbstractUnitRange,Vararg{Any,N} where N}} where A<:DenseArray where N where T, DenseArray} where N where T, Base.ReshapedArray{T,N,A,MI} where MI<:Tuple{Vararg{Base.MultiplicativeInverses.SignedMultiplicativeInverse{Int64},N} where N} where A<:Union{Base.ReinterpretArray{T,N,S,A} where S where A<:Union{SubArray{T,N,A,I,true} where I<:Union{Tuple{Vararg{Real,N} where N}, Tuple{AbstractUnitRange,Vararg{Any,N} where N}} where A<:DenseArray where N where T, DenseArray} where N where T, SubArray{T,N,A,I,true} where I<:Union{Tuple{Vararg{Real,N} where N}, Tuple{AbstractUnitRange,Vararg{Any,N} where N}} where A<:DenseArray where N where T, DenseArray} where N where T, DenseArray}} where T ``` Note: all relevant changes are in [base/show.jl](https://github.com/JuliaLang/julia/pull/36107/files#diff-b4267643a238b5a375b3e055817ee6ca)

pauljurczak · June 4, 2020, 5:48pm

Thanks a lot for your detailed response. The Julia community really is top-notch!

I’m looking forward to VSCode plugin improvements. Still debating whether to start with Juno and switch to VSCode in a few months or just forgo two learning curves and go straight to VSCode.

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Structured display for Julia objects

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