PyPro #69 Swap Cases

Swap Cases in Python

Swap Cases in Python

Write a Python program to swap cases of an alphanumeric string.

Swap Cases

import string

def swapCase(sourceString):
    newString = ''
    
    for character in sourceString:
        if character not in string.ascii_letters:
            newString += character
        elif character.isupper():
            newString += character.lower()
        elif character.islower():
            newString += character.upper()
    
    return newString
	
swapCase('My name is Ethan, I am 23.')		# 'mY NAME IS eTHAN, i AM 23.'

See also:

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