[R-pkg-devel] Python installation for automatic checks

[Geoff Converse]

Hello,

I am trying to submit a package to CRAN, but it failed the auto checks at
win-builder.r-project.org with errors that I do not know how to fix. My
package uses Tensorflow for R, which in turn requires a Python installation
of Tensorflow. I am unsure of how to get R / reticulate to find the Python
installations on other machines automatically. Here are the two error
messages that I get:

*Debian*:

Error: Installation of TensorFlow not found.
Python environments searched for 'tensorflow' package:
 /usr/bin/python3.8
You can install TensorFlow using the install_tensorflow() function.

It seems best to avoid using the "install_tensorflow()" function, and I
have followed the instructions at
https://cran.r-project.org/web/packages/reticulate/vignettes/python_dependencies.html
including making changes to the DESCRIPTION file and .onLoad function, but
to no avail.

*Windows*:

Error in python_config(miniconda_python, NULL, miniconda_python) :
  Error 2 occurred running
C:/Users/ligges/AppData/Local/r-miniconda/envs/r-reticulate/python.exe

I am not familiar with reticulate, and do not know what "Error 2" refers
to. This error occurs every time a test tries to use "tensorflow::" or
"keras::". I would be very grateful if someone could help me solve this
issue.

Thank you!
Geoff Converse

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