unable to install impedancefitter

[StefanPofahl]

I fail to install the PyPy-package ImpedanceFitter.
I also tried in Julia RC v.1.8.3.
Here my commands:

import Pkg; Pkg.add("CondaPkg")
import Pkg; Pkg.add("PythonCall")
impfit = PythonCall.pyimport("impedancefitter")

and here is the error output on my machine:

The environment can't be solved, aborting the operation
error    libmamba Could not solve for environment specs
critical libmamba UnsatisfiableError
ERROR: failed process: Process(`'C:\Users\stefanpofahl\.julia\artifacts\7950c161b9c76ecc6d58b2b6734696fee7d8e4a0\Library\bin\micromamba.exe' -r 'C:\Users\stefanpofahl\.julia\scratchspaces\0b3b1443-0f03-428d-bdfb-f27f9c1191ea\root' create -y -p 'C:\Users\stefanpofahl\.julia\environments\v1.9\.CondaPkg\env' --override-channels --no-channel-priority "impedancefitter[version='*']" "python[version='>=3.7,<4',channel='conda-forge',build='*cpython*']" -c conda-forge`, ProcessExited(1)) [1]

Stacktrace:
  [1] pipeline_error
    @ .\process.jl:565 [inlined]
  [2] run(::Cmd; wait::Bool)
    @ Base .\process.jl:480
  [3] run(::Cmd)
    @ Base .\process.jl:477
  [4] _run(io::IO, cmd::Cmd, args::Any; flags::Any)
    @ CondaPkg C:\Users\stefanpofahl\.julia\packages\CondaPkg\RuSdR\src\resolve.jl:301
  [5] _resolve_conda_install(io::Any, conda_env::Any, specs::Any, channels::Any; create::Any)
    @ CondaPkg C:\Users\stefanpofahl\.julia\packages\CondaPkg\RuSdR\src\resolve.jl:202
  [6] resolve(; force::Bool, io::IO, interactive::Bool, dry_run::Bool)
    @ CondaPkg C:\Users\stefanpofahl\.julia\packages\CondaPkg\RuSdR\src\resolve.jl:452
  [7] resolve()
    @ CondaPkg C:\Users\stefanpofahl\.julia\packages\CondaPkg\RuSdR\src\resolve.jl:315
  [8] add(pkgs::AbstractVector; resolve::Any, file::Any, temp::Any)
    @ CondaPkg C:\Users\stefanpofahl\.julia\packages\CondaPkg\RuSdR\src\deps.jl:244
  [9] add(pkgs::AbstractVector)
    @ CondaPkg C:\Users\stefanpofahl\.julia\packages\CondaPkg\RuSdR\src\deps.jl:231
 [10] add(pkg::Union{CondaPkg.ChannelSpec, CondaPkg.PipPkgSpec, CondaPkg.PkgSpec}; kw::Base.Pairs{Symbol, V, Tuple{Vararg{Symbol, N}}, NamedTuple{names, T}} where {V, N, names, T<:Tuple{Vararg{Any, N}}})
    @ CondaPkg C:\Users\stefanpofahl\.julia\packages\CondaPkg\RuSdR\src\deps.jl:248
 [11] add(pkg::Union{CondaPkg.ChannelSpec, CondaPkg.PipPkgSpec, CondaPkg.PkgSpec})
    @ CondaPkg C:\Users\stefanpofahl\.julia\packages\CondaPkg\RuSdR\src\deps.jl:248
 [12] add(pkg::AbstractString; version::Any, channel::Any, build::Any, kw::Base.Pairs{Symbol, V, Tuple{Vararg{Symbol, N}}, NamedTuple{names, T}} where {V, N, names, T<:Tuple{Vararg{Any, N}}})
    @ CondaPkg C:\Users\stefanpofahl\.julia\packages\CondaPkg\RuSdR\src\deps.jl:375
 [13] add(pkg::AbstractString)
    @ CondaPkg C:\Users\stefanpofahl\.julia\packages\CondaPkg\RuSdR\src\deps.jl:375
 [14] top-level scope
    @ REPL[6]:1

Do you have asuggestion?

[cjdoris]

You tried to install impedancefitter as a Conda package, but it is not on Conda, it is only on PyPI. Therefore you need to add it as a pip package, e.g. pkg> conda pip_add impedancefitter or CondaPkg.add_pip("impedancefitter").

[StefanPofahl]

unfortunatly it does not work for me, at least under Ubuntu:

The environment can't be solved, aborting the operation
error    libmamba Could not solve for environment specs
critical libmamba UnsatisfiableError
ERROR: failed process: Process(`/home/stefan/.julia/artifacts/6e6d5245d8ef7b40183c446606c8b1590c0788f1/bin/micromamba -r /home/stefan/.julia/scratchspaces/0b3b1443-0f03-428d-bdfb-f27f9c1191ea/root install -y -p /home/stefan/.julia/environments/v1.6/.CondaPkg/env --override-channels --no-channel-priority "impedance[version='*']" "pip[version='>=22.0.0']" "python[version='>=3.7,<4',channel='conda-forge',build='*cpython*']" -c conda-forge`, ProcessExited(1)) [1]

Stacktrace:
  [1] pipeline_error
    @ ./process.jl:538 [inlined]
  [2] run(::Cmd; wait::Bool)
    @ Base ./process.jl:453
  [3] run(::Cmd)
    @ Base ./process.jl:451
  [4] _run(io::IO, cmd::Cmd, args::Any; flags::Any)
    @ CondaPkg ~/.julia/packages/CondaPkg/RuSdR/src/resolve.jl:301
  [5] _resolve_conda_install(io::Any, conda_env::Any, specs::Any, channels::Any; create::Any)
    @ CondaPkg ~/.julia/packages/CondaPkg/RuSdR/src/resolve.jl:202
  [6] _resolve_conda_install(io::Any, conda_env::Any, specs::Any, channels::Any)
    @ CondaPkg ~/.julia/packages/CondaPkg/RuSdR/src/resolve.jl:192
  [7] resolve(; force::Bool, io::IO, interactive::Bool, dry_run::Bool)
    @ CondaPkg ~/.julia/packages/CondaPkg/RuSdR/src/resolve.jl:433
  [8] resolve()
    @ CondaPkg ~/.julia/packages/CondaPkg/RuSdR/src/resolve.jl:317
  [9] add(pkgs::AbstractVector{T} where T; resolve::Any, file::Any, temp::Any)
    @ CondaPkg ~/.julia/packages/CondaPkg/RuSdR/src/deps.jl:244
 [10] add(pkgs::AbstractVector{T} where T)
    @ CondaPkg ~/.julia/packages/CondaPkg/RuSdR/src/deps.jl:232
 [11] pip_add(args::Vector{String}; binary::String)
    @ CondaPkg.PkgREPL ~/.julia/packages/CondaPkg/RuSdR/src/PkgREPL.jl:164
 [12] pip_add(args::Vector{String})
    @ CondaPkg.PkgREPL ~/.julia/packages/CondaPkg/RuSdR/src/PkgREPL.jl:164
 [13] do_cmd!(command::Pkg.REPLMode.Command, repl::REPL.LineEditREPL)
    @ Pkg.REPLMode /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.6/Pkg/src/REPLMode/REPLMode.jl:408
 [14] do_cmd(repl::REPL.LineEditREPL, input::String; do_rethrow::Bool)
    @ Pkg.REPLMode /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.6/Pkg/src/REPLMode/REPLMode.jl:386
 [15] do_cmd
    @ /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.6/Pkg/src/REPLMode/REPLMode.jl:377 [inlined]
 [16] (::Pkg.REPLMode.var"#24#27"{REPL.LineEditREPL, REPL.LineEdit.Prompt})(s::REPL.LineEdit.MIState, buf::IOBuffer, ok::Bool)
    @ Pkg.REPLMode /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.6/Pkg/src/REPLMode/REPLMode.jl:550
 [17] #invokelatest#2
    @ ./essentials.jl:708 [inlined]
 [18] invokelatest
    @ ./essentials.jl:706 [inlined]
 [19] run_interface(terminal::REPL.Terminals.TextTerminal, m::REPL.LineEdit.ModalInterface, s::REPL.LineEdit.MIState)
    @ REPL.LineEdit /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.6/REPL/src/LineEdit.jl:2441
 [20] run_frontend(repl::REPL.LineEditREPL, backend::REPL.REPLBackendRef)
    @ REPL /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.6/REPL/src/REPL.jl:1126
 [21] (::REPL.var"#44#49"{REPL.LineEditREPL, REPL.REPLBackendRef})()
    @ REPL ./task.jl:417

[cjdoris]

You also need to remove the Conda package you added before: pkg> conda rm impedancefitter.

[StefanPofahl]

Thanks for your support :-)
I have tried your approach, with a restart in-between.
First removal with Conda. Re-Start of Julia. Installation via CondaPkg.
Unfortunately, it does not work on MS-Windows nor on on Linux / Unbuntu

[cjdoris]

Please send me a sequence of steps I can run to reproduce the error.

[StefanPofahl]

import Conda
Conda.rm("impedancefitter")
restart
import CondaPkg
CondaPkg.add_pip("impedancefitter")

Meanwhile, I tried another time and now the error message is gone under MS-windows :-)

[StefanPofahl]

Installation seemed to work under MS-Win, but the following command
impfit = PythonCall.pyimport("impedancefitter")
gave this error:

Python: ImportError: DLL load failed while importing _common: Die angegebene Prozedur wurde nicht gefunden.
pythrow() at err.jl:94
errcheck at err.jl:10 [inlined]
pyimport(m::String) at import.jl:11
top-level scope at example_impedancefitter.jl:53
eval at boot.jl:368 [inlined]

[cjdoris]

OK I can reproduce that error on Windows.

Steps to reproduce:

julia --project=@issue245
] add CondaPkg PythonCall
using CondaPkg
] conda pip_add impedancefitter
using PythonCall
pyimport("impedancefitter")

Error:

ERROR: Python: ImportError: DLL load failed while importing _common: The specified procedure could not be found.
Python stacktrace:
 [1] <module>
   @ C:\Users\chris\.julia\environments\issue245\.CondaPkg\env\Lib\site-packages\openturns\common.py:15
 [2] <module>
   @ C:\Users\chris\.julia\environments\issue245\.CondaPkg\env\Lib\site-packages\openturns\__init__.py:49
 [3] <module>
   @ C:\Users\chris\.julia\environments\issue245\.CondaPkg\env\Lib\site-packages\impedancefitter\postprocess.py:22
 [4] <module>
   @ C:\Users\chris\.julia\environments\issue245\.CondaPkg\env\Lib\site-packages\impedancefitter\__init__.py:38
Stacktrace:
 [1] pythrow()
   @ PythonCall C:\Users\chris\.julia\packages\PythonCall\Td3SH\src\err.jl:94
 [2] errcheck
   @ C:\Users\chris\.julia\packages\PythonCall\Td3SH\src\err.jl:10 [inlined]
 [3] pyimport(m::String)
   @ PythonCall C:\Users\chris\.julia\packages\PythonCall\Td3SH\src\concrete\import.jl:11
 [4] top-level scope
   @ REPL[2]:1

It looks like it cannot open ...\site-packages\openturns\_common.pyd. Indeed, this cannot be opened with dlopen either, the following produces the same message "The specified procedure could not be found":

using Libdl
dlopen(raw"C:\Users\chris\.julia\environments\issue245\.CondaPkg\env\Lib\site-packages\openturns\_common.pyd")

Presumably there is some DLL somewhere that Windows can't find for some reason. Will need to investigate.

[cjdoris]

The error does not occur when doing import impedancefitter from the Python REPL (in the same Conda environment). Hence this really is a bug in PythonCall.

The same error occurs in PyCall by doing:

] add Conda PyCall
using Conda
Conda.pip("install", "impedancefitter")
using PyCall
pyimport("impedancefitter")

[github-actions]

This issue has been marked as stale because it has been open for 30 days with no activity. If the issue is still relevant then please leave a comment, or else it will be closed in 7 days.

[StefanPofahl]

Last time I tested it, it was still relevant ...
I have put it on my todo-list to test again.

[StefanPofahl]

You can close the issue. I was able to start the package.

[cjdoris]

It works now? What changed?

[StefanPofahl]

Thanks for your response, sorry I made a mistake, I was able to install it via PyCall.

The installation under Linux in combination with PythonCall still fails :-(

My Julia is:

julia> versioninfo()
Julia Version 1.9.3
Commit bed2cd540a1 (2023-08-24 14:43 UTC)
Build Info:
  Official https://julialang.org/ release
Platform Info:
  OS: Linux (x86_64-linux-gnu)
  CPU: 8 × Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-14.0.6 (ORCJIT, haswell)
  Threads: 1 on 8 virtual cores

Which method for installation do you prefer, add or add_pip?
A

import CondaPkg; CondaPkg.add("impedancefitter")

B

import CondaPkg; CondaPkg.add_pip("impedancefitter")

Which environment variables and constants should I check, when working with PythonCall?
To get started with impedancefitter under PyCall I needed to run the following once:

    ENV["CONDA_JL_HOME"] = "/home/user_account_name/.julia/conda/3"
    const Conda.ROOTENV = "/home/user_account_name/.julia/conda/3"
    import Pkg; Pkg.build("PyCall") # this will (re-)build as well "Conda"
    exit()

Note: The Conda path above is an example, please check what makes sense on your machine.

[cjdoris]

Option B. Like I said above, that package is not available from Conda, only Pip.

I'm surprised it worked with PyCall - I got the same error last time I tried.

[StefanPofahl]

Ok, the issue does still exist under Linux :-(

[StefanPofahl]

I have worked further on the issue and you are right, also under PyCall you need to install via pip, see here.