from cryptography.fernet import Fernet
key = Fernet.generate_key()
key = b''
input_file = 'test.txt'
output_file = 'test.encrypted'

with open(input_file, 'rb') as f:
data = f.read()

fernet = Fernet(key)
encrypted = fernet.encrypt(data)

with open(output_file, 'wb') as f:
f.write(encrypted)

"Fernet key must be 32 url-safe base64-encoded bytes."
ValueError: Fernet key must be 32 url-safe base64-encoded bytes.

hello john with id no 345678 with phone no 12345678
hello peter with id no 87654 with phone no 45678990