Cesar Cipher

[Pedroski55]

I learned this whilst working for MI5! (Top secret, don't tell anyone!)

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from string import ascii_lowercase, ascii_uppercase, digits, punctuation, whitespace   alpha = ascii_uppercase + ascii_lowercase + digits + punctuation len(alpha) # 94   # Thank you Franz Schubert! text = '''Ave Maria Gratia plena Maria, gratia plena Maria, gratia plena Ave, ave dominus Dominus tecum Benedicta tu in mulieribus Et benedictus Et benedictus fructus ventris Ventris tuae, Jesus. Ave Maria'''   def cyberSecurity(text):     text_list = [t for t in text]     for i in range(len(text_list)):         if text_list[i] in alpha:             index = alpha.index(text_list[i])             # go back to the beginning if index > len(alpha) - 4             if index > len(alpha) - 5:                 index = 4 - (len(alpha) - index )                 text_list[i] = alpha[index]             else:                 text_list[i] = alpha[index+4]     coded = ''.join(text_list)     return coded   print(cyberSecurity(text))

Unbreakable code, but hard to sing!

Output:
Ezi Qevme
Kvexme tpire
Qevme: kvexme tpire
Qevme: kvexme tpire
Ezi: ezi hsqmryw
Hsqmryw xigyq
Firihmgxe xy mr qypmivmfyw
Ix firihmgxyw
Ix firihmgxyw jvygxyw zirxvmw
Zirxvmw xyei: Niwyw<
Ezi Qevme