Caesar Cipher - shift cipher

def caesarDecipher( cipherText = "" ):
    """ Caesar cipher is sometimes called a shift cipher. Decipher given ciphertext."""
    print( '>> ' + cipherText )     # DEBUG output
    ordA = ord('A')                 # ord() gets codepoint for Unicode char
    cipherText = cipherText.upper() # force UPPERCASE ascii
    # assume UPPERCASE or <space ' '>
    for k in range( 1, 26 ) :
        plainTxt = ''
        for token in cipherText :
            if token == ' ':  # space chars pass thru ..
                plainChar = ' '
            else:             # map char using shift ..
                plainOrd = ord( token ) - k
                if plainOrd < ordA : plainOrd += 26

                plainChar = chr( plainOrd )
            #
            plainTxt += plainChar  # append each char to build 'plaintext'
        #

        # DEBUG: show result for each key in 1..25
        if k <= 9 :
            key = ' ' + str(k) # space pad for single digit .. pretty print !
        else:
            key = str(k)
        #
        outTxt = key +' '+ plainTxt
        print( outTxt )
    #
#--------------------

def caesarEncipher( plainText = "" ):
    """ Caesar cipher is sometimes called a shift cipher. Encipher given plaintext."""
    print( '>> ' + plainText )      # DEBUG output
    ordZ = ord('Z')                 # ord() gets codepoint for Unicode char
    plainText = plainText.upper()   # force UPPERCASE ascii
    # assume UPPERCASE or <space ' '>
    for k in range( 1, 26 ) :
        cipherText = ''
        for token in plainText :
            if token == ' ':   # space chars pass thru ..
                cypherChar = ' '
            else:              # map char using shift ..
                cypherOrd = ord( token ) + k
                if cypherOrd > ordZ : cypherOrd -= 26

                cypherChar = chr( cypherOrd )
            #
            cipherText += cypherChar  # append each char to build 'cyphertext'
        #

        # DEBUG: show result for each key in 1..25
        if k <= 9 :
            key = ' ' + str(k) # space pad for single digit .. pretty print !
        else:
            key = str(k)
        #
        outTxt = key +' '+ cipherText
        print( outTxt )
    #
#-------------------------
# TEST calls ..
print( '\n*** DECIPHER ***\n' )
caesarDecipher('PM FVB JHU NBLZZ AOL RLF PA PZ LHZF AV KLJYFWA AOL TLZZHNL')

print( '\n*** ENCIPHER ***\n' )
caesarEncipher('IF YOU CAN GUESS THE KEY IT IS EASY TO DECRYPT THE MESSAGE')

print( '\n*** DECIPHER another ... ***\n' )
caesarDecipher('WJYZWS YT WTRJ') # .. RETURN TO ROME