I would like to access R from within a Python program.  I am aware of Rpy2, pyrserve and PypeR.
What are the advantages or disadvantages of these three options?
in pyper, i can't pass large matrix from python to r instance with assign(). however, i don't have issue with rpy2. 
it is just my experience.
How do Rpy2, pyrserve and PypeR compare?