best way to encrypt and decrypt string using python code example

Example 1: encrypt and decrypt python

# encrypting
from cryptography.fernet import Fernet
message = "my deep dark secret".encode()

f = Fernet(key)
encrypted = f.encrypt(message)
# decrypting
from cryptography.fernet import Fernet
encrypted = b"...encrypted bytes..."

f = Fernet(key)
decrypted = f.decrypt(encrypted)

Example 2: how to encrypt a string python

from cryptography.fernet import Fernet
message = "my deep dark secret".encode()

f = Fernet(key)
encrypted = f.encrypt(message)