r_to_py leading to matrix error in versions >1.3.5 when using python library metas_unclib

[joan-metas]

For reticulate version >1.3.5 (on R 4.4.1) r_to_py leads to a matrix error when using with the python library metas_unclib. This library returns values with uncertainties as shown in the example below. In version 1.3.5 the matrix conversion was working correctly.

library(reticulate)
unc <- import("metas_unclib", delay_load = TRUE)
x <- c(1:3)
cov <- diag(0, NROW(x), NROW(x))
r_to_py(unc$ufloatarray(x, cov))

which returns
[1.0 ± 0.0, 2.0 ± 0.0, 3.0 ± 0.0]

The matrix conversion for metas_unclib objects may have been depricated by later reticulate versions.

[t-kalinowski]

Hi, can you please provide instructions for how to install "metas_unclib"?

I tried py_install("metas_unclib") and encountered error:

  ModuleNotFoundError: No module named 'clr'

then I tried py_install("clr") and encountered error:

> unc <- import("metas_unclib")
Error in py_module_import(module, convert = convert) : 
  AttributeError: module 'clr' has no attribute 'AddReference'

[joan-metas]

Hello, Sorry for the missing instructions… here some details. ***@***.*** The library can be found here: https://pypi.org/project/metas-unclib/ And an msi-installer here: https://www.metas.ch/metas/en/home/fabe/hochfrequenz/unclib.html Thank you! From: Tomasz Kalinowski ***@***.***> Sent: Mittwoch, 25. September 2024 15:20 To: rstudio/reticulate ***@***.***> Cc: Fritsche Johannes METAS ***@***.***>; Author ***@***.***> Subject: Re: [rstudio/reticulate] r_to_py leading to matrix error in versions >1.3.5 when using python library metas_unclib (Issue #1676) Hi, can you please provide instructions for how to install "metas_unclib"? I tried py_install("metas_unclib") and encountered error: ModuleNotFoundError: No module named 'clr' then I tried py_install("clr") and encountered error:

unc <- import("metas_unclib")

Error in py_module_import(module, convert = convert) : AttributeError: module 'clr' has no attribute 'AddReference' — Reply to this email directly, view it on GitHub<#1676 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/BLSHCUSETBF52UVD4HROKHTZYKZ6JAVCNFSM6AAAAABO2ELRHWVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDGNZUGA3DOMZUGY>. You are receiving this because you authored the thread.Message ID: ***@***.******@***.***>>

[t-kalinowski]

My best guess is that this is due to NumPy 2.0. Have you tried installing older versions of NumPy (and Scipy, and possibly other packages)?

[joan-metas]

I've also tested this with NumPy 1.26, with the same result. Metas_unclib has no other dependency, as far as I know. Tracing the error back, it appear at r_to_py_impl(x, convert = convert) I can stick to reticulate 1.35, which works fine…. It may just be an issue with later package distribution.