Unable to import juliacall in Python

[zornsllama]

Hi,

I have not had any issues in using PythonCall within Julia, but when importing juliacall in Python I obtain the following error message:

❯ python3
Python 3.10.8 (main, Nov  1 2022, 14:18:21) [GCC 12.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from juliacall import Main as jl
[juliapkg] Locating Julia ^1.6
[juliapkg] Querying Julia versions from https://julialang-s3.julialang.org/bin/versions.json
[juliapkg] Using Julia 1.8.2 at /usr/bin/julia
[juliapkg] Using Julia project at /home/---/.julia/environments/pyjuliapkg
[juliapkg] Installing packages:
           julia> import Pkg
           julia> Pkg.add([Pkg.PackageSpec(name="PythonCall", uuid="6099a3de-0909-46bc-b1f4-468b9a2dfc0d")])
           julia> Pkg.resolve()
    Updating registry at `~/.julia/registries/General.toml`
   Resolving package versions...
  No Changes to `~/.julia/environments/pyjuliapkg/Project.toml`
  No Changes to `~/.julia/environments/pyjuliapkg/Manifest.toml`
  No Changes to `~/.julia/environments/pyjuliapkg/Project.toml`
  No Changes to `~/.julia/environments/pyjuliapkg/Manifest.toml`
ERROR: InitError: AssertionError: pystr_asstring(jl.__version__) == string(VERSION)
Stacktrace:
  [1] init_juliacall()
    @ PythonCall ~/.julia/packages/PythonCall/Z6DIG/src/juliacall.jl:14
  [2] (::PythonCall.var"#176#180")()
    @ PythonCall ~/.julia/packages/PythonCall/Z6DIG/src/PythonCall.jl:89
  [3] with_gil
    @ ~/.julia/packages/PythonCall/Z6DIG/src/cpython/gil.jl:14 [inlined]
  [4] with_gil
    @ ~/.julia/packages/PythonCall/Z6DIG/src/cpython/gil.jl:9 [inlined]
  [5] __init__()
    @ PythonCall ~/.julia/packages/PythonCall/Z6DIG/src/PythonCall.jl:84
  [6] _include_from_serialized(pkg::Base.PkgId, path::String, depmods::Vector{Any})
    @ Base ./loading.jl:831
  [7] _require_search_from_serialized(pkg::Base.PkgId, sourcepath::String, build_id::UInt64)
    @ Base ./loading.jl:1039
  [8] _require(pkg::Base.PkgId)
    @ Base ./loading.jl:1315
  [9] _require_prelocked(uuidkey::Base.PkgId)
    @ Base ./loading.jl:1200
 [10] macro expansion
    @ ./loading.jl:1180 [inlined]
 [11] macro expansion
    @ ./lock.jl:223 [inlined]
 [12] require(into::Module, mod::Symbol)
    @ Base ./loading.jl:1144
 [13] top-level scope
    @ none:5
during initialization of module PythonCallTraceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/---/.local/lib/python3.10/site-packages/juliacall/__init__.py", line 137, in <module>
    init()
  File "/home/---/.local/lib/python3.10/site-packages/juliacall/__init__.py", line 131, in init
    raise Exception('PythonCall.jl did not start properly')
Exception: PythonCall.jl did not start properly

Any help in resolving this would be greatly appreciated!

[cjdoris]

That's really odd. What version of JuliaCall are you on, have you updated recently? Do you set any environment variables?

[zornsllama]

Ah yep, probably should've realized this myself. Just updated JuliaCall from v0.6.0 to v0.9.9 and the issue has fixed itself. Thanks for your response in any case!