Question

In Python, write a program that assigns “codes” to each letter of the alphabet. For example,

codes = {“a”: “%”, “b”:”9”, “c”:”?”,….}

Write a function that takes in this dictionary and a sentence to encrypt the sentence. Write another function that takes the encrypted sentence and decrypt it.

Answer 1

#method to encrypt a sentence given codes 2 def encrypt (codes,sentence): #loop through sentence for l in sentence: 4 #get the value from charcter I enc - codes [1] 6 7 8 9 10 11 12 13 return enc #method to decrypt a sentence given codes def decrypt (codes, sentence): dec- n #loop through sentence for l in sentence: 15 16 17 #get the key key (key for (key, value) in codes.items() if value dec +key 1][0] return dec 19 20 codes {"a":"X" , "b":"9","c":"?"} 21 encrypted-encrypt (codes, "abc") 22 print("Encrypted Sentence:",encrypted) 23 decrypteddecrypt(codes, encrypted) 24 print("Decrypted Sentence:",decrypted) 25 26 27 sample output 28 Encrypted Sentence: %97 29 Decrypted Sentence: abc 30

#method to encrypt a sentence given codes

def encrypt(codes,sentence):

enc = ""

#loop through sentence

for l in sentence:

#get the value from charcter l

enc += codes[l]

return enc

#method to decrypt a sentence given codes

def decrypt(codes,sentence):

dec = ""

#loop through sentence

for l in sentence:

#get the key

key = [key for (key, value) in codes.items() if value == l][0]

dec += key

return dec

codes = {"a":"%","b":"9","c":"?"}

encrypted = encrypt(codes,"abc")

print("Encrypted Sentence:",encrypted)

decrypted = decrypt(codes,encrypted)

print("Decrypted Sentence:",decrypted)

"""

sample output

Encrypted Sentence: %9?

Decrypted Sentence: abc

"""