curriculum/challenges/english/blocks/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
Next, modify print('Key: ' + custom_key) to use an f-string.
You should modify the print('Key: ' + custom_key) call so that it prints the same result using an f-string.
({ test: () => assert.match(code, /^print\s*\(\s*f("|')Key:\s\{\s*custom_key\s*\}\1\s*\)/m) })
text = 'mrttaqrhknsw ih puggrur'
custom_key = 'python'
def vigenere(message, key, direction=1):
key_index = 0
alphabet = 'abcdefghijklmnopqrstuvwxyz'
final_message = ''
for char in message.lower():
# Append any non-letter character to the message
if not char.isalpha():
final_message += char
else:
# Find the right key character to encode/decode
key_char = key[key_index % len(key)]
key_index += 1
# Define the offset and the encrypted/decrypted letter
offset = alphabet.index(key_char)
index = alphabet.find(char)
new_index = (index + offset*direction) % len(alphabet)
final_message += alphabet[new_index]
return final_message
def encrypt(message, key):
return vigenere(message, key)
def decrypt(message, key):
return vigenere(message, key, -1)
--fcc-editable-region--
print(f'Encrypted text: {text}')
print('Key: ' + custom_key)
--fcc-editable-region--
#decryption = decrypt(encryption, custom_key)
#print(decryption)