Usage instructions for encryption with public key and decryption with private key?

[sgbaird]

What I could gather is that there is functionality for signing an "unaltered message":

from rsa.key import PrivateKey
from rsa import pkcs1

q=1640646288909657487095359180022062734411738001375224362146789767743298223
e=65537
d=3932070503866894845499545149242528634855814001291977329776170446942801119476224356319257882634777292449414158422402140416944887130847435068069262510801361
p=4287309565142106169103473694063731192260977968066421817319213385543808560298868219
n=7033958527457273924268579824377868739560691183608262863345913379771000030685205506298398376078296576269289512487456279410830335887754385753052069093874837

privkey = PrivateKey(n, e, d, p, q)

signature = pkcs1.sign("hello".encode('utf8'), privkey, 'SHA-256')

print(signature)

(where the integers were generated via https://colab.research.google.com/drive/1uDH-Vqq5fdKBcKa-Ha9OfO3DBpf042CB?usp=sharing).

However, I'm not seeing a PublicKey class nor any decrypt options. Also, decrypt for PrivateKey seems to only take integers (?).