New issue 1072: Add support to YTArray for remaining unsupported ufuncs https://bitbucket.org/yt_analysis/yt/issues/1072/add-support-to-ytarray-for-... Nathan Goldbaum: Right now YTArray supports most numpy ufuncs, but it looks like there are a few that need to be implemented still. * bitwise_and * bitwise_or * invert * left_shift * right_shift * ldexp