capitalize
Returns a copy (if needed) of this string having its first letters are titlecased using the rules of the default locale, or the original string if it's empty or already starts with a title case letter.
This function supports one-to-many character mapping, thus the length of the returned string can be greater than one. For example, '\uFB00'.titlecase() returns "\u0046\u0066", where '\uFB00' is the LATIN SMALL LIGATURE FF character (ff). If this character has no title case mapping, the result of uppercase is returned instead.