Python string encryption/decryption

crypt.py

from cryptography.fernet import Fernet


class Crypt:
    def __init__(self, key: str):
        self.key = key.encode()
        self.cipher = Fernet(self.key)

    def encrypt(self, plaintext: str) -> str:
        encrypted_text = self.cipher.encrypt(plaintext.encode())
        return encrypted_text.decode()

    def decrypt(self, encrypted_text: str) -> str:
        decrypted_text = self.cipher.decrypt(encrypted_text.encode())
        return decrypted_text.decode()


# Example usage:
# key = Fernet.generate_key().decode()  # Generate a new key
# crypt = Crypt(key)
# encrypted = crypt.encrypt("Hello, World!")
# decrypted = crypt.decrypt(encrypted)
# print(f"Encrypted: {encrypted}")
# print(f"Decrypted: {decrypted}")