Error in "using PythonCall"

[jianghaizhu]

I wanted to give this excellent package a try but got the following error. Julia 1.7.2 on macOS 11.6.5.

julia> using PythonCall
    CondaPkg Found dependencies: /Users/zhuj6/.julia/environments/v1.7/CondaPkg.toml
    CondaPkg Found dependencies: /Users/zhuj6/.julia/packages/PythonCall/XgP8G/CondaPkg.toml
ERROR: InitError: IOError: could not spawn `/Users/zhuj6/.julia/artifacts/bfd9e864c155203704978fba74583859175640d2/bin/micromamba --version`: no such file or directory (ENOENT)
Stacktrace:
  [1] _spawn_primitive(file::String, cmd::Cmd, stdio::Vector{Any})
    @ Base ./process.jl:100
  [2] #690
    @ ./process.jl:113 [inlined]
  [3] setup_stdios(f::Base.var"#690#691"{Cmd}, stdios::Vector{Any})
    @ Base ./process.jl:197
  [4] _spawn
    @ ./process.jl:112 [inlined]
  [5] open(cmds::Cmd, stdio::Base.DevNull; write::Bool, read::Bool)
    @ Base ./process.jl:371
  [6] open
    @ ./process.jl:362 [inlined]
  [7] open(cmds::Cmd, mode::String, stdio::Base.DevNull)
    @ Base ./process.jl:342
  [8] read(cmd::Cmd)
    @ Base ./process.jl:416
  [9] read(cmd::Cmd, #unused#::Type{String})
    @ Base ./process.jl:427
 [10] executable(; io::IO)
    @ MicroMamba ~/.julia/packages/MicroMamba/0sM3G/src/MicroMamba.jl:44
 [11] cmd(; io::IO)
    @ MicroMamba ~/.julia/packages/MicroMamba/0sM3G/src/MicroMamba.jl:115
 [12] cmd(args::Any; io::IO)
    @ MicroMamba ~/.julia/packages/MicroMamba/0sM3G/src/MicroMamba.jl:119
 [13] conda_cmd(args::Any; io::IO)
    @ CondaPkg ~/.julia/packages/CondaPkg/GoPlj/src/backend.jl:38
 [14] _resolve_conda_create(io::Any, conda_env::Any, specs::Any, channels::Any)
    @ CondaPkg ~/.julia/packages/CondaPkg/GoPlj/src/resolve.jl:144
 [15] resolve(; force::Bool, io::IO, interactive::Bool, dry_run::Bool)
    @ CondaPkg ~/.julia/packages/CondaPkg/GoPlj/src/resolve.jl:261
 [16] resolve()
    @ CondaPkg ~/.julia/packages/CondaPkg/GoPlj/src/resolve.jl:209
 [17] envdir()
    @ CondaPkg ~/.julia/packages/CondaPkg/GoPlj/src/env.jl:66
 [18] init_context()
    @ PythonCall.C ~/.julia/packages/PythonCall/XgP8G/src/cpython/context.jl:56
 [19] __init__()
    @ PythonCall.C ~/.julia/packages/PythonCall/XgP8G/src/cpython/CPython.jl:21
 [20] _include_from_serialized(path::String, depmods::Vector{Any})
    @ Base ./loading.jl:768
 [21] _require_search_from_serialized(pkg::Base.PkgId, sourcepath::String)
    @ Base ./loading.jl:854
 [22] _require(pkg::Base.PkgId)
    @ Base ./loading.jl:1097
 [23] require(uuidkey::Base.PkgId)
    @ Base ./loading.jl:1013
 [24] require(into::Module, mod::Symbol)
    @ Base ./loading.jl:997
during initialization of module C

[cjdoris]

What is in /Users/zhuj6/.julia/artifacts/bfd9e864c155203704978fba74583859175640d2/? Is there a bin/ folder?

My guess is that your anti-virus has deleted the micromamba executable.

[jianghaizhu]

I have bin/ and info/ under /Users/zhuj6/.julia/artifacts/bfd9e864c155203704978fba74583859175640d2/. bin/ is empty but info/ has a bunch of files under it. I also checked other artifacts and their executabls are still under their bin/.

[cjdoris]

If bin is there but empty I'm now 99% sure it's your anti-virus - check if it has quarantined the executable.

Failing that, delete /Users/zhuj6/.julia/artifacts/bfd9e864c155203704978fba74583859175640d2/ and try again. Failing that, install Conda or Mamba or MicroMamba yourself and set the environment variable JULIA_CONDAPKG_BACKEND=System.

[jianghaizhu]

You are absolutely right. My anti-virus quarantined the file. Thank you so much!

[cjdoris]

Great 👍