R, Python: install packages on rpy2

Question

I\'m using R in my Python script through the rpy2 library and I need a package that is not in the default installation of R. How can I install it?

Answer 1

When running pytest, Aaron's answer makes my Python hang and R keep giving error messages, probably because of this:

Calling install_packages() without first choosing a mirror will require the user to interactively choose a mirror.

According to rpy2 documentation, I used this which worked:

from rpy2 import robjects
import rpy2.robjects.packages as rpackages

utils = rpackages.importr('utils')
utils.chooseCRANmirror(ind=1)
utils.install_packages("DirichletReg")
DirichletReg = rpackages.importr("DirichletReg")