def METHOD_NAME(cls):
    with open(os.path.join(os.path.dirname(os.path.realpath(__file__)), "data/test_bip32.json"), encoding="utf-8") as f:
        cls.data = json.load(f)
        for key in cls.data["serialization"]:
            deser = key["deser"]
            deser["pub_version"] = binascii.unhexlify(deser["pub_version"])
            deser["priv_version"] = binascii.unhexlify(deser["priv_version"])
            deser["hex_parent_fingerprint"] = deser["parent_fingerprint"]
            deser["parent_fingerprint"] = binascii.unhexlify(deser["parent_fingerprint"])
            deser["hex_chaincode"] = deser["chaincode"]
            deser["chaincode"] = binascii.unhexlify(deser["chaincode"])
            deser["hex_pubkey"] = deser["pubkey"]
            deser["pubkey"] = binascii.unhexlify(deser["pubkey"])
            deser["hex_privkey"] = deser["privkey"]
            deser["privkey"] = binascii.unhexlify(deser["privkey"])