The string module

Contains ('preprogrammed') functions on strings, e.g.:

import string

aString="sandY"

capitalize=string.capitalize(aString)     # returns Sandy (a string)
lower=string.lower(aString)               # returns sandy (a string)
replace=string.replace(aString,"sa","ci") # returns cindY (a string)
find=string.find(aString,"n")             # returns 2 (an integer),
                                          # index of the letter n