pydata/pandas — pull request #2352 by milkypostman (2012-11-25 06:59:06+00:00)
Title: Support for datetime columns with rpy2

Check to see if the values we're looking at are numpy datetime64
objects. If they are, we can assume we're looking at a Timestamp object,
which subclasses Python's datetime class, and we return a struct_time
which is understood by rpy2's POSIXct class.

Attempt at fixing 2351