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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def create_ecdsap256_key_pair():
 """ Create a new ECDSAP256 key pair. :returns: a tuple of the public and private keys """

    pub  = ECDSAP256PublicKey()
    priv = ECDSAP256PrivateKey()
    rc = _lib.xtt_crypto_create_ecdsap256_key_pair(pub.native, priv.native)
    if rc == RC.SUCCESS:
        return (pub, priv)
    else:
        raise error_from_code(rc)