Using openturns from R via reticulate

Installation
1

Hi,

I am trying to use functions from the openturns Python package from R. I believe it should be possible to install and import Python packages using the R-package reticulate , but it does not seem to work for openturns . It seems to work fine for other packages (such as scipy , numpy and pandas ), but I can’t get it to work with openturns . Installing the package seems to work fine but I get an error message when I try to import it. This is what I am doing:

library(reticulate)
use_condaenv("C:/AppsM/Anaconda/")
import("numpy")
Module(numpy)
import("openturns")
Error in py_module_import(module, convert = convert) : 
   ImportError: DLL load failed while importing _common: La procédure spécifiée est introuvable.

Can anyone help?

Many thanks in advance,
Sophie.

2

Hi Sophie,
There is a bug with numpy and OpenTURNS that was identified lately on Windows:

There is a conda command that can be used to reinstall this:

$ pip install numpy --force-reinstall --no-deps

This is discussed in the topic just below on “Aesara”
Regards,
Michaël

3

Thank you for your answer Michaël. Nevertheless, using Anaconda Spyder (Windows), I have no problem to install and import OpenTURNS. This works fine.

My problem arises when I try to install and import OpenTURNS using the R-package reticulate that allows to call Python from R (Interface to Python • reticulate). Then, it works for other packages (Scipy, Numpy and Pandas) but not for OpenTURNS with the following error message:

ImportError: DLL load failed while importing _common: La procédure spécifiée est introuvable.

Regards,
Sophie.

4

Did you try to use the suggested pip command? I am not sure that my message was accurate enough. According to @schueller : "this is due to a conflict with numpy (and scipy) mingw runtime" . This is not related to Spyder.

Regards,
Michaël

5

Yes, I did it. But, unfortunately, it still doesn’t work…
Regards,
Sophie.

6

Do you have multiple Python distributions on the system? This may explain why loading OpenTURNS fails from R (which may use the Python distribution A), while you can at the same time load if from Python distribution B. Hence, if the effect of the pip install numpy --force-reinstall --no-deps command is to fix the install in distribution B, this has no effect of install A.
To check this, you can do as follows:

  • from the base Python environment, print the python, numpy and scipy versions ;
  • from Reticulate, print the same versions numbers.

Here is a sample Python code:

>>> import sys
>>> sys.version
'3.9.2 (default, Feb 28 2021, 17:03:44) \n[GCC 10.2.1 20210110]'
>>> import numpy
>>> numpy.__version__
'1.22.1'

Regards,

Michaël
PS
Is there any chance that you asked the same question on Stack at this link?

7

this should be fixed now

8

Yes, it works! Thank you very much.
Regards,
Sophie.