Hail_Caesar.py

# Kata link:
# https://www.codewars.com/kata/57067d7b7a53e88ae400024c

# -------------------------------------
# Instructions:
'''
You are in the ancient Roman army and are Caesar's trusted companion and
military advisor. He confides in you about numerous plots he has thwarted
to take his life and tasks you to devise a way to keep secrets secret from
his enemies.


You begin by creating a shift cipher, where the values of the letters get
shifted by a specified (input) degree.

(exit story arc: A modern case of a shift cipher is the ROT13 cipher. The
values of the letters are shifted by 13 places;'A' to 'N', and 'B' ↔ to'O'.

Create a function which takes a ROT13 encoded string as input and outputs
a decoded string.

All letters are uppercase. Don't transform any non-alphabetic characters
like spaces or punctuation, but do pass them on to the output.
'''

# -------------------------------------
# Solution:
import codecs

def hail_caesar(enc_str):
    return codecs.decode(enc_str, 'rot13')


# solution 2:
# def hail_caesar(enc_str):
    # mapa = str.maketrans('ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz', 'NOPQRSTUVWXYZABCDEFGHIJKLMnopqrstuvwxyzabcdefghijklm')
    # return enc_str.translate(mapa)



# -------------------------------------
# Basic Tests


print("test:")

encoded = "GUR DHVPX OEBJA QBT WHZCRQ BIRE GUR YNML SBK."
decoded = "THE QUICK BROWN DOG JUMPED OVER THE LAZY FOX."
print(hail_caesar(encoded) == decoded)
print(decoded)