MANIPLACION DE CADENAS MEDIANTE LA CREACION DE UN CIFRADO paso 49

text = ‘Hello Zaira’

alphabet = ‘abcdefghijklmnopqrstuvwxyz’

encrypted_text = ’ ’

shift = 3

def caesar():

for char in text.lower():

    if char == ' ':

        encrypted_text += char

    else:

        index = alphabet.find(char)

        new_index = (index + shift) % len (alphabet)

        encrypted_text += alphabet\[new_index\]

        print('plain text:',text)

        print('encrypted text:', encrypted_text)

donde esta mi error gracias de antemano.

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