reticulate + virtual environment

[sigbert]

Hi

I am using reticulate and a virtual environment (not conda) to run Python scripts from RStudio. However, when I try to use my own (existing) virtual environment, reticulate does not use it. If I run my scripts, the installed modules (e.g., py_install("pandas", "mmstat4.hu.data")) are not found. I believe this happens because reticulate is using r-reticulate instead of mmstat4.hu.data. How can I force reticulate to use my virtual environment?

Thanks Sigbert

> library("reticulate")
> py_config()
python:         /home/sk/.virtualenvs/r-reticulate/bin/python
libpython:      /usr/lib/python3.10/config-3.10-x86_64-linux-gnu/libpython3.10.so
pythonhome:     /home/sk/.virtualenvs/r-reticulate:/home/sk/.virtualenvs/r-reticulate
version:        3.10.12 (main, Mar 22 2024, 16:50:05) [GCC 11.4.0]
numpy:          /home/sk/.virtualenvs/r-reticulate/lib/python3.10/site-packages/numpy
numpy_version:  2.0.0
> virtualenv_list()
[1] "mmstat4.hu.data" "r-reticulate"   
> use_virtualenv("mmstat4.hu.data", required=TRUE)
> py_config()
python:         /home/sk/.virtualenvs/r-reticulate/bin/python
libpython:      /usr/lib/python3.10/config-3.10-x86_64-linux-gnu/libpython3.10.so
pythonhome:     /home/sk/.virtualenvs/r-reticulate:/home/sk/.virtualenvs/r-reticulate
version:        3.10.12 (main, Mar 22 2024, 16:50:05) [GCC 11.4.0]
numpy:          /home/sk/.virtualenvs/r-reticulate/lib/python3.10/site-packages/numpy
numpy_version:  2.0.0
> virtualenv_list()
[1] "mmstat4.hu.data" "r-reticulate"   

[vedoa]

Hi,

not the prettiest way but this works for me

Sys.setenv(RETICULATE_PYTHON_ENV="sigbert")
library(reticulate)
py_config()
virtualenv_list()

output

python:         -.virtualenvs/sigbert/Scripts/python.exe
libpython:      -/Python311/python311.dll
pythonhome:     -/.virtualenvs/sigbert
version:        3.11.7 (tags/v3.11.7:fa7a6f2, Dec  4 2023, 19:24:49) [MSC v.1937 64 bit (AMD64)]
Architecture:   64bit
numpy:          -/.virtualenvs/sigbert/Lib/site-packages/numpy
numpy_version:  2.0.0

where sigbert is a non default environment now set and i can use it.

If it needs to be loaded before the script then add a .Renviron file with

RETICULATE_PYTHON_ENV="sigbert"

in your working folder. Hope it helps.

[t-kalinowski]

There are many ways you can influence which Python reticulate discovers.

Please take a look at the "Order of Discovery" on this page: Python Version Configuration • reticulate.

[sigbert]

Hi,

I have found a solution that works for me. I changed the virtual environment on the command line, but of course I run my Python script through the RStudio editor. If I go to Tools -> Global Options -> Python and change to my virtual environment, everything works fine. I'm not sure what the default is when, as in my case, no project is open.

Sigbert