Calling a python function from R with passing the arguments

Question

Is there any package for calling a python function from R by passing the function arguments through R? Now i have directly called the python file using system in R.

a<-system('/home/anaconda3/bin/python  /home/Desktop/myfile.py' ,intern = TRUE)

But this myfile.py file is having a function with paramenter. How to specify the parameter in R?

I have tried system('/home/anaconda3/bin/python /home/Desktop/myfile.py argument',wait=FALSE,intern = TRUE) .But it returns 0.

TheAvenger · Accepted Answer · 2018-12-04 09:21:34Z

1

for example I want to pass the number of core that my python script can use:

system(paste('/home/anaconda3/bin/python','home/Desktop/myfile.py',NCORE))

Then in Python Script before launch the function I can read my parameter in this way:

n_core = int(sys.argv[1])

sys.argv is a list in Python, which contains the command-line arguments passed to the script.

answered Dec 4, 2018 at 9:21

TheAvenger

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2 Comments

pseudorandom Over a year ago

I'm attempting this same logic right now, and R is finding the executable but not finding the .py script. The .py script does exist. Is there any special difference between ' or "? Should there be spaces between the string objects passed through system()?

pseudorandom Over a year ago

Oh, apparently you can't have spaces in the path name. It runs if I remove spaces in the underlying folder structure names. Is there a way to keep spaces? I can rely on myself to not put spaces in but I can't guarantee that others using this script will do the same.

user10742441 · Accepted Answer · 2018-12-04 06:22:11Z

1

please look at reticulate

library(reticulate)
os <- import("os")
os$listdir(".")

answered Dec 4, 2018 at 6:22

user10742441

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