Series.str.
find
Return lowest indexes in each strings in the Series/Index.
Each of returned indexes corresponds to the position where the substring is fully contained between [start:end]. Return -1 on failure. Equivalent to standard str.find().
str.find()
sub (str) – Substring being searched.
start (int) – Left edge index.
end (int) – Right edge index.
Series or Index of int.
See also
rfind
Return highest indexes in each strings.