Re: how to use r-keras?

[Simon Tournier]

Hi Ricardo,

On sam., 30 mars 2024 at 00:27, Ricardo Wurmus <rekado@elephly.net> wrote:

>> $ guix shell r r-keras -C python-minimal r-reticulate tensorflow
>
> Is this with tensorflow from guix-science?  The old Tensorflow 1.9 in
> Guix does not provide Keras.  Only the more recent one in Guix Science
> does.

Using Guix 929ddec, it fails as reported previously; using
tensorflow@1.9.0.  Let try with tensorflow@2.13.1.

Well, although I have guix.bordeaux.inria.fr as substitutes, I had to
rebuild tensorflow.  Ouch!

Then I get this:

--8<---------------cut here---------------start------------->8---
$ guix time-machine -C channels.scm -- shell -C r r-keras -C python-minimal 
r-reticulate tensorflow@2.13.1
simon@lili /tmp [env]$ R

R version 4.3.3 (2024-02-29) -- "Angel Food Cake"
Copyright (C) 2024 The R Foundation for Statistical Computing
Platform: x86_64-unknown-linux-gnu (64-bit)

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.

R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.

Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.

> library(keras)
> model <- keras_model_sequential()
Would you like to create a default python environment for the reticulate 
package? (Yes/no/cancel) no
Error: Valid installation of TensorFlow not found.

Python environments searched for 'tensorflow' package:
 
/gnu/store/66ncidnhpj2djnik3g6iljzr30k056cy-python-minimal-3.10.7/bin/python3.10

Python exception encountered:
 Traceback (most recent call last):
  File 
"/gnu/store/sd979h0ckv6fnmwqvlypq91w49q9521k-r-reticulate-1.35.0/site-library/reticulate/python/rpytools/loader.py",
 line 119, in _find_and_load_hook
    return _run_hook(name, _hook)
  File 
"/gnu/store/sd979h0ckv6fnmwqvlypq91w49q9521k-r-reticulate-1.35.0/site-library/reticulate/python/rpytools/loader.py",
 line 93, in _run_hook
    module = hook()
  File 
"/gnu/store/sd979h0ckv6fnmwqvlypq91w49q9521k-r-reticulate-1.35.0/site-library/reticulate/python/rpytools/loader.py",
 line 117, in _hook
    return _find_and_load(name, import_)
ModuleNotFoundError: No module named 'tensorflow'


You can install TensorFlow using the install_tensorflow() function.
--8<---------------cut here---------------end--------------->8---

And I guess that’s not better. :-)

Hum, working with Keras needs more love…

Cheers,
simon