I've been trying to make an encryption and decryption system but I have run into a small error. Here is my code:
import sys
import pyperclip
def copy(data):
question = input("Copy to clipboard? ")
if question.lower() == 'yes' or question.lower() == 'y':
pyperclip.copy(data)
print("Encrypted message copied to clipboard.")
rerun()
elif question.lower() == 'no' or question.lower() == 'n':
rerun()
else:
print("You did not enter a valid input.")
copy(data)
def rerun():
ask = input("\nWould you like to run this program again? ")
if ask.lower() == "yes" or ask.lower() == "y":
print(" ")
run()
elif ask.lower() == 'no' or ask.lower() == 'n':
sys.exit("\nThank you!")
else:
print("You did not enter a valid input.")
rerun()
def encrypt(key, msg):
encrypted_message = []
for i, c in enumerate(msg):
key_c = ord(key[i % len(key)])
msg_c = ord(c)
encrypted_message.append(chr((msg_c + key_c) % 127))
return ''.join(encrypted_message)
def decrypt(key, encrypted):
msg = []
for i, c in enumerate(encrypted):
key_c = ord(key[i % len(key)])
enc_c = ord(c)
msg.append(chr((enc_c - key_c) % 127))
return ''.join(msg)
def run():
function_type = input("Would you like to encrypt or decrypt a message? ")
if function_type.lower() == "encrypt" or function_type.lower() == "e":
key = input("\nKey: ")
msg = input("Message: ")
data = encrypt(key, msg)
enc_message = "\nYour encrypted message is: " + data
print(enc_message)
copy(data)
elif function_type.lower() == "decrypt" or function_type.lower() == "d":
key = input("\nKey: ")
question = input("Paste encrypted message from clipboard? ")
if question.lower() == 'yes' or question.lower() == 'y':
encrypted = pyperclip.paste()
print("Message: " + encrypted)
elif question.lower() == 'no' or question.lower() == 'n':
encrypted = input("Message: ")
else:
print("You did not enter a valid input.")
run()
decrypted = decrypt(key, encrypted)
decrypted_message = "\nYour decrypted message is: " + decrypted
print(decrypted_message)
copy(decrypted)
else:
print("\nYou did not enter a valid input.\n")
run()
run()
It says local variable 'encrypted' might be referenced before assignment and highlights
decrypted = decrypt(key, encrypted)
under the run() function.
Is it because I used the variable 'encrypted' in other functions? If so, how would I fix this and still maintain the functionality of my program?
I am relatively new to python so I would appreciate it if you could explain your answers.