Julia inside Python inside Blender

blender_julia.py

bl_info = {
    "name": "Julia console",
    "blender": (4, 0, 0),
    "category": "Scripting",
}

def register():
    # install JuliaCall within Blender's Python environment (if not already installed)
    import importlib
    if importlib.util.find_spec('juliacall') is None:
        import pip
        pip.main(['install', 'juliacall'])

    # set number of Julia threads to 1 (otherwise bpy usage will crash)
    import os
    os.environ["PYTHON_JULIACALL_THREADS"] = "1"

    # load Julia with JuliaCall
    import juliacall

    # start Julia REPL in the terminal
    juliacall.Main.seval('import REPL; import Pkg; Base.active_repl = REPL.LineEditREPL(REPL.Terminals.TTYTerminal(get(ENV,"TERM",""),stdin,stdout,stderr), true); Threads.@spawn :interactive REPL.run_repl(Base.active_repl, backend->(Base.active_repl_backend = backend));')

    # load PythonCall and bpy Python module within Julia
    juliacall.Main.seval('using PythonCall; bpy = pyimport("bpy")')

    # schedule a Blender timer to allow Julia run
    import bpy
    def julia_work():
        juliacall.Main.sleep(0.01)
        return 0.01

    julia_timer = bpy.app.timers.register(julia_work, persistent=True)


def unregister():
    pass


if __name__ == "__main__":
    register()