docs: def get_pubkey_hex( privatekey_hex ):
      """
      Get the uncompressed hex form of a private key
      """
      if not isinstance(privatekey_hex, (str, unicode)):
          raise ValueError("private key is not a hex string but {}".format(str(type(privatekey_hex))))
  
      # remove 'compressed' hint
      if len(privatekey_hex) > 64:
          if privatekey_hex[-2:] != '01':
              raise ValueError("private key does not end in 01")
  
          privatekey_hex = privatekey_hex[:64]
  
      # get hex public key
      privatekey_int = int(privatekey_hex, 16)
      privk = ec.derive_private_key(privatekey_int, ec.SECP256K1(), default_backend())
      pubk = privk.public_key()
      x = pubk.public_numbers().x
      y = pubk.public_numbers().y
  
      pubkey_hex = "04{:064x}{:064x}".format(x, y)
      return pubkey_hex