$ pip install hypercore-crypto
from pysodium import crypto_sign_PUBLICKEYBYTES
from hypercore_crypto import data, key_pair
public_key, secret_key = key_pair()
assert len(public_key) == crypto_sign_PUBLICKEYBYTES
print(data(b"hello world").hex())
Output:
ccfa4259ee7c41e411e5770973a49c5ceffb5272d6a37f2c6f2dac2190f7e2b7