Python - Change case with built-in string functions

Case conversion in Python is quite easy with those built-in string functions:

swapcase()
Return a copy of the string with uppercase characters converted to lowercase and vice versa.

upper()
Return a copy of the string converted to uppercase.

title()
Return a titlecased version of the string: words start with uppercase characters, all remaining cased characters are lowercase.

lower()
Return a copy of the string converted to lowercase.

capitalize()
Return a copy of the string with only its first character capitalized.



References: http://docs.python.org/2/library/stdtypes.html#string-methods