configure reticulate

[schmettow]

index.Rmd

• use Python 2.7
• one session per chapter

[lenabrandl]

According to multiple sources, the reticulate package (which would enable both desired features) requires the preview version (or daily releases) of RStudio v1.2. It appears that unless we want to switch to the preview of RStudio v1.2, we have to be patient until its completion.

I tried to implement reticulate in RStudio v1.1.456, but as expected, it did not work.

Sources https://blog.rstudio.com/2018/03/26/reticulate-r-interface-to-python/ https://rstudio.github.io/reticulate/articles/rstudio_ide.html https://www.rstudio.com/products/rstudio/download/preview/

[schmettow]

I succesfully tested the following on reticulate in rmarkdown:

• sustained Python session
• suppressing evaluation of chunks and it worked fine. See the file Test_reticulate.Rmd.

Note that for knitting individual files (chapters) of a book, it works best to directly call: rmarkdown::render("Test_reticulate.Rmd") rather than hitting any buttons in Rstudio.

[lenabrandl]

I see the misunderstanding now. I falsely expected reticulate to sustain one session between individually executed code chunks in the .Rmd file.

Sustaining one Python/R session and supressing code evaluation while knitting works, but sustaining one session between individually executed chunks does not. See the screenshot for clarification.

[schmettow]

I see. That is probably with Rstudio 1.2. It is a little burden for the process of writing. Can we close the issue?

[lenabrandl]

RStudio is still defaulting to Python 3 on my system (still looking into that), so the issue isn't solved yet completely.