pwtools
Call try_set_attr(_<attr_name>_raw) and return it if set, else None. This is faster but the same the same as raw_slice_get(<attr_name>, sl=slice(None), axis=0) or axis=1 or any other valid axis.
try_set_attr(_<attr_name>_raw)
raw_slice_get(<attr_name>, sl=slice(None), axis=0)