Hi,
PyROOT in trunk (i.e. w/ Cling) is not yet feature-complete; will get there, but is taking some time and effort.
A dependency on numpy would be too much to maintain (the various python versions, the various ways people install them, the various distribution systems, and the 3 major platforms is already rather taxing). However, if a minimum requirement of p2.6 (technically, PyROOT still supports python all the way down to p2.2) would be acceptable, then the buffer interface of numpy could be supported, which should allow an easy conversion on the python side (with the actual conversion/copying in C, and hence it’d be both clean and fast).
Cheers,
Wim