Invoke Python command from R script with System()

Question

In my R script I have to execute an external Python script and I'd use the System() function.

system("python -m premailer -f daily-report.html -o
ready-weekly-report.html")

But after running this in the R console this is what I get

/usr/bin/python: No module named premailer

If I run the python command from the terminal everything works.

EDIT

• The command I'm try to run in this R script is premailer (https://github.com/peterbe/premailer)
• I have installed premailer on my machine.
• I'm on Unix OS

Answer 1

This is how I fixed this.

Adding the following line to the end of that file, showed me the correct path in Rstudio after restarting my R kernel:

.Internal(Sys.setenv("PATH", paste("/usr/local/bin", Sys.getenv("PATH"), sep=":")))