code: def from_privkey(cls, privkey, prefix=None):
          
          privkey = PrivateKey(privkey, prefix=prefix or Prefix.prefix)
          secret = unhexlify(repr(privkey))
          order = ecdsa.SigningKey.from_string(
              secret, curve=ecdsa.SECP256k1
          ).curve.generator.order()
          p = ecdsa.SigningKey.from_string(
              secret, curve=ecdsa.SECP256k1
          ).verifying_key.pubkey.point
          x_str = ecdsa.util.number_to_string(p.x(), order)
          # y_str = ecdsa.util.number_to_string(p.y(), order)
          compressed = hexlify(chr(2 + (p.y() & 1)).encode("ascii") + x_str).decode(
              "ascii"
          )
          # uncompressed = hexlify(
          #    chr(4).encode('ascii') + x_str + y_str).decode('ascii')
          return cls(compressed, prefix=prefix or Prefix.prefix)
docs: Derive uncompressed public key