python cryptography encrypt pem issue

cryptography-test.py

#!/usr/bin/python

from cryptography.hazmat.primitives import (
	serialization,
	hashes,
)
from cryptography.hazmat.primitives.asymmetric import (
	rsa,
	padding,
)

_private_key = rsa.generate_private_key(
	public_exponent = 65537,
	key_size = 2048,
)

_padding = padding.OAEP(
	mgf = padding.MGF1(algorithm = hashes.SHA256()),
	algorithm = hashes.SHA256(),
	label = None
)

_pem = _private_key\
	.public_key()\
	.public_bytes(
		encoding = serialization.Encoding.PEM,
		format = serialization.PublicFormat.SubjectPublicKeyInfo
	)

message = _private_key.public_key().encrypt(
	_pem,
	_padding
)

print(message)