Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Using Python, how would I alter the functions for atbash_encrypt() and atbash_decrypt(crypto) so that they'll be able to work with ab.atbash_encrypt('HELLO') and ab.atbash_decrypt('SVOOL')?
![def atbash_encrypt():
alpha
reverse_alpha = 'ZYXWVUTSRQPONMLKJIHGFEDCBA'
input_string
output_string
for character in input_string:
= 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
= input ('Enter string: ')
output (alpha, reverse_alpha, character)
if reverse == None:
output_string = None
%3D
break
else:
output_string += reverse
print('Reverse string:', output_string)
def atbash_decrypt(crypto):
alpha ='ABCDEFGHIJKLMNOPQRSTUVWXYZ'
reverse_alpha ='ZYXWVUTSRQPONMLKJIHGFEDCBA'
crypto = crypto.upper()
%3D
message =
for character in crypto:
if character in reverse_alpha:
= reverse_alpha.find(character)
message = message + alpha[character_index]
else:
message = message + character
return message](https://content.bartleby.com/qna-images/question/3200e892-7b83-4670-8aa5-c4c84f2a6adb/d93492e2-fd47-4a28-b170-961b97a36506/86glhdm_processed.png)
Transcribed Image Text:def atbash_encrypt():
alpha
reverse_alpha = 'ZYXWVUTSRQPONMLKJIHGFEDCBA'
input_string
output_string
for character in input_string:
= 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
= input ('Enter string: ')
output (alpha, reverse_alpha, character)
if reverse == None:
output_string = None
%3D
break
else:
output_string += reverse
print('Reverse string:', output_string)
def atbash_decrypt(crypto):
alpha ='ABCDEFGHIJKLMNOPQRSTUVWXYZ'
reverse_alpha ='ZYXWVUTSRQPONMLKJIHGFEDCBA'
crypto = crypto.upper()
%3D
message =
for character in crypto:
if character in reverse_alpha:
= reverse_alpha.find(character)
message = message + alpha[character_index]
else:
message = message + character
return message
Transcribed Image Text:import both of the functions from atbash.py below, such that the code
ab.atbash_encrypt('HELLO') and ab.atbash_decrypt('SVOOL') both execute without
issue.
The assert cells below this question only test the import.
N # YOUR CODE HERE
from atbash import atbash_encrypt
from atbash import atbash_decrypt
I assert callable(ab.atbash_encrypt)
# hidden test to ensure atbash_encrypt works on import
NameError
Traceback (most recent call last)
<ipython-input-16-8858e219fd8d> in <module>
----> 1 assert callable(ab.atbash_encrypt)
2
3 # hidden test to ensure atbash_encrypt works on import
NameError: name
ab
is not defined
N assert callable(ab.atbash_decrypt)
# hidden test to ensure atbash_decrypt works on import
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