Have you even looked at statistics? I get the impression you haven't. Pandas has aggregation and that's it. I don't really like to start those language wars, but what the heck. Your precious pandas is actually worse than the R alternatives in every way. It is slower than data.table while having comparable syntax. Dplyr is comparable in speed while having WAY better syntax.
Take a look: http://pandas.pydata.org/pandas-docs/stable/
EDIT: Specified name of interface (rpy2).