Importing python modules failed from the specified python

[shayandavoodii]

Today I installed the latest version of PythonCall.jl (v0.9.10) package and started with:

julia> using PythonCall

julia> ENV["JULIA_CONDAPKG_BACKEND"] = "Null"
"Null"

julia> ENV["JULIA_PYTHONCALL_EXE"] = raw"C:\Users\Shayan\AppData\Local\Programs\Python\Python310\python.exe"
"C:\\Users\\Shayan\\AppData\\Local\\Programs\\Python\\Python310\\python.exe"

Then I closed the Julia session and started a new one to continue. Then I failed to import the numpy package via pyimport:

julia> using PythonCall

julia> pyimport("numpy")
ERROR: Python: ModuleNotFoundError: No module named 'numpy'
Python stacktrace: none
Stacktrace:
 [1] pythrow()
   @ PythonCall C:\Users\Shayan\.julia\packages\PythonCall\3GRYN\src\err.jl:94
 [2] errcheck
   @ C:\Users\Shayan\.julia\packages\PythonCall\3GRYN\src\err.jl:10 [inlined]
 [3] pyimport(m::String)
   @ PythonCall C:\Users\Shayan\.julia\packages\PythonCall\3GRYN\src\concrete\import.jl:11
 [4] top-level scope
   @ REPL[2]:1

Also, I tried setting the path to the directory rather than the executable Python:

julia> ENV["JULIA_PYTHONCALL_EXE"] = raw"C:\Users\Shayan\AppData\Local\Programs\Python\Python310"
"C:\\Users\\Shayan\\AppData\\Local\\Programs\\Python\\Python310"

But, still, I couldn't import numpy. Note that I made sure that the numpy is installed in the specified environment:

C:\Users\Shayan>pip list numpy
⋮
numpy              1.23.5
⋮

[cjdoris]

You need to set those env vars before you import PythonCall, and they need to be set every time - so if you restart Julia you need to set them again.

It's usual to set these in your Julia startup file or your shell startup file if you're coming from bash/zsh/etc.

[shayandavoodii]

@cjdoris

need to set those env vars before you import PythonCall...

Both .../Python310 and .../Python310/python.exe? I guess one of these would be enough(?).

[shayandavoodii]

You need to set those env vars before you import PythonCall, and they need to be set every time - so if you restart Julia you need to set them again.

It's usual to set these in your Julia startup file or your shell startup file if you're coming from bash/zsh/etc.

Setting the following lines into the startup.jl file get the job done:

ENV["JULIA_CONDAPKG_BACKEND"] = "Null"
ENV["JULIA_PYTHONCALL_EXE"] = raw"C:\Users\Shayan\AppData\Local\Programs\Python\Python310\python.exe"

julia> using PythonCall

julia> ts = pyimport("transformers")
Python _LazyModule: <module 'transformers' from 'C:\\Users\\Shayan\\AppData\\Local\\Programs\\Python\\Python310\\lib\\site-packages\\transformers\\__init__.py'>

Thanks. Please note to mention this precisely in the documentation as well.

[cjdoris]

Thanks. Please note to mention this precisely in the documentation as well.

You're welcome. Will do!