Closed
Description
Affects: PythonCall
Describe the bug
I would like to get a pointer to a view of a PyArray
julia> using PythonCall
julia> x = view(PyArray(UInt8[1,2,3]), 1:2)
2-element view(::PyArray{UInt8, 1}, 1:2) with eltype UInt8:
0x01
0x02
julia> y = Base.cconvert(Ptr{UInt8}, x)
2-element view(::PyArray{UInt8, 1}, 1:2) with eltype UInt8:
0x01
0x02
julia> Base.unsafe_convert(Ptr{UInt8}, y)
ERROR: MethodError: no method matching elsize(::Type{PyArray{UInt8, 1, true, true, UInt8}})
The function `elsize` exists, but no method is defined for this combination of argument types.
Closest candidates are:
elsize(::Type{Union{}}, Any...)
@ Base array.jl:233
elsize(::Type{<:LinearAlgebra.Adjoint{<:Real, P}}) where P<:(AbstractVecOrMat)
@ LinearAlgebra ~/.julia/juliaup/julia-1.11.2+0.x64.linux.gnu/share/julia/stdlib/v1.11/LinearAlgebra/src/adjtrans.jl:355
elsize(::Type{A}) where {T, A<:(Array{T})}
@ Base array.jl:225
...
Stacktrace:
[1] elsize(A::PyArray{UInt8, 1, true, true, UInt8})
@ Base ./abstractarray.jl:257
[2] _memory_offset(x::PyArray{UInt8, 1, true, true, UInt8}, I::Int64)
@ Base ./abstractarray.jl:1239
[3] unsafe_convert(::Type{Ptr{…}}, V::SubArray{UInt8, 1, PyArray{…}, Tuple{…}, true})
@ Base ./reshapedarray.jl:329
[4] top-level scope
@ REPL[71]:1
Some type information was truncated. Use `show(err)` to see complete types.Your system
Julia Version 1.11.2
Commit 5e9a32e7af2 (2024-12-01 20:02 UTC)
Build Info:
Official https://julialang.org/ release
Platform Info:
OS: Linux (x86_64-linux-gnu)
CPU: 16 × Intel(R) Core(TM) i7-10700KF CPU @ 3.80GHz
WORD_SIZE: 64
LLVM: libLLVM-16.0.6 (ORCJIT, skylake)
Threads: 1 default, 0 interactive, 1 GC (on 16 virtual cores)
PythonCall v0.9.23