Core Classes & Data Model
Querying & Loading Data
Managing Data
Geometry Utilities
Utilities
Fill in missing .start/.stop, also deal with negative values, which are treated as offsets from the end.
.step parameter is left unchanged.
Example
np.s_[:3, 4: ], (10, 20) -> np._s[0:3, 4:20] np.s_[:3, :-3], (10, 20) -> np._s[0:3, 0:17]