Encrypt or Decrypt a file using a password in python

encryptDecrypt.py

from cryptography.fernet import Fernet
import base64, hashlib

def gen_fernet_key(passcode) -> bytes: # Modified from https://stackoverflow.com/a/72758959/2246411
    hlib = hashlib.md5()
    hlib.update(bytes(passcode, 'utf-8'))
    return base64.urlsafe_b64encode(hlib.hexdigest().encode('latin-1'))

def encrypt_file(target_file, fernet): # https://www.geeksforgeeks.org/encrypt-and-decrypt-files-using-python/
    with open(target_file, 'rb') as file:
        original = file.read()
        
    encrypted = fernet.encrypt(original)
    
    with open(target_file, 'wb') as encrypted_file:
        encrypted_file.write(encrypted)

def decrypt_file(target_file, fernet): # https://www.geeksforgeeks.org/encrypt-and-decrypt-files-using-python/
    with open(target_file, 'rb') as enc_file:
        encrypted = enc_file.read()
    
    decrypted = fernet.decrypt(encrypted)
    
    with open(target_file, 'wb') as dec_file:
        dec_file.write(decrypted)

password = "your_password"
key = gen_fernet_key(password)
fernet = Fernet(key)

target_file = "path_to_file"
 
encrypt_file(target_file, fernet)
# decrypt_file(target_file, fernet)