Alternating Caps

def switchcase(text):
    cap = False
    t = ''
    for character in text:
        if character.lower() in "abcdefghijklmnopqrstubvwxyz":
            if cap:
                t += character.upper()
            else:
                t += character.lower()
            cap = not cap

        else:
            t += character

    return t

if __name__ == "__main__":
    while True:
        print(switchcase(input(">>> ")))