Question

This is a Python Program

Write a program that encrypts letters based on the following key.

Original letter to encrypted letter

A M

B L

C K

D J

E I

F H

G G

H F

I E

J D

K C

L B

M A

N Z

O Y

P X

Q W

R V

S U

T T

U S

V R

W Q

X P

Y O

Z N

Write the output to a file

Answer 1

Program

def cipher(text):
    cipherText=""
    cipher = []
    for letter in range(77,64,-1):
        cipher.append(chr(letter))
    for letter in range(90,77,-1):
        cipher.append(chr(letter))
  

    plain = []
    for letter in range(65, 91):
        plain.append(chr(letter))

   
    for i in range(len(text)):
        if text[i] in plain:
           cipherText +=cipher[plain.index(text[i])]

    return cipherText

def main():

    #Call function with input "WXYZ"
    result=cipher("WXYZ")
    try:
        file=input("Enter file name :")
        infile = open(file,'w')
        infile.write(result)
        infile.close()
    except IOError:
        print ('An error occured trying to read file')
   
      
main()   

Screenshot