- DataArray.str.rindex(sub, start=0, end=None)#
Return highest indexes in each strings where the substring is fully contained between [start:end]. This is the same as
str.rfindexcept instead of returning -1, it raises a ValueError when the substring is not found.
If start, end, or ‘sub` is array-like, they are broadcast against the array and applied elementwise.
ValueError – substring is not found