the following table is list of some of the most commonly used string methods and their descriptionsmethods descriptions count(substring[start,end]counts the occurrences of substring with optional start and end parameters expandtabs([tabsize]replaces tabs with spaces find(substring[startend]returns the index of the first occurrence of substring or returns - if the substring is not found isalnum(returns true if all characters are alphanumericreturns false otherwise isalpha(returns true if all characters are alphabeticreturns false otherwise isdigit(returns true if all characters are digitsreturns false otherwise join(tjoins the strings in sequence lower(converts the string to all lowercase replace(oldnew [maxreplace]replaces old substring with new substring strip([characters]removes whitespace or optional characters split([separator][maxsplit]splits string separated by whitespace or an optional separator returns list