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I have created a RMarkdown document with some objects in a Python code chunk. I'd like to be able to see these objects in the Environment window list in RStudio like the objects created in a R code chunk.

For instance, if I create a vetor, say:

a = c(1,2,3,4,5)

in a R code chunk (i.e. if I wrap the code with {r}, it will appear in the Environment window list.

On the other hand, if I create another vector in a Python code chunk, like the one below:

b = [1,2,3,4,5]

b will not be listed in the Environment window. At least, I was not able to find a way to have it shown there.

On the other hand, b can be accessed in a R code chunk by prefixing it with "py$" like "py$b"

Is there a way to achieve this?

Gustavo Mirapalheta
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1 Answers1

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In any chunk that assigns to a Python variable b, follow that assignment with a command like r.b = b. Then b and its value will appear in the Environment window.

r. is the converse of py$; it lets the Python chunk access the R namespace.

Reference: https://blog.rstudio.com/2018/03/26/reticulate-r-interface-to-python/

Edit: to be more concise, you could chain the assignment: r.b = b = [1,2,3,4,5]

Not completely sure it's wise, though. The whole thing about Python chain assignments going left-to-right (see, e.g., https://stackoverflow.com/a/36346517) freaks me out. The point made there about two Python variables pointing to the same object should be kept in mind, although as far as I can tell, assigning a new value to b in an R chunk doesn't change the value of py$b.

David Kaufman
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