New issue 552: cut_region doesn't work in 3.0 https://bitbucket.org/yt_analysis/yt/issue/552/cut_region-doesnt-work-in-30 Nathan Goldbaum: It seems that subselecting on data objects using field cuts hasn't been implemented in 3.0. ``` #!python from yt.mods import * pf = load('DD0000/DD0000') dd = pf.h.all_data() lt = dd.cut_region("grid['Temperature'] < 1e5") lt['CellMassMsun'].sum() ``` ``` #!python traceback Traceback (most recent call last): File "test2.py", line 8, in <module> lt['CellMassMsun'].sum() File "/home/goldbaum/yt-3.0/yt/data_objects/data_containers.py", line 200, in __getitem__ self.get_data(f) File "/home/goldbaum/yt-3.0/yt/data_objects/data_containers.py", line 470, in get_data self.hierarchy._identify_base_chunk(self) File "/home/goldbaum/yt-3.0/yt/geometry/grid_geometry_handler.py", line 237, in _identify_base_chunk gi = dobj.selector.select_grids(self.grid_left_edge, File "/home/goldbaum/yt-3.0/yt/data_objects/data_containers.py", line 441, in selector raise YTDataSelectorNotImplemented(self._type_name) yt.utilities.exceptions.YTDataSelectorNotImplemented: Data selector 'cut_region' not implemented. ```