Series.str.
index
Return lowest indexes in each string in Series/Index.
Each of the returned indexes corresponds to the position where the substring is fully contained between [start:end]. This is the same as str.find except instead of returning -1, it raises a ValueError when the substring is not found. Equivalent to standard str.index.
str.find
str.index
sub (str) – Substring being searched.
start (int) – Left edge index.
end (int) – Right edge index.
Series or Index of object
See also
rindex
Return highest indexes in each strings.