def hex_to_fea(fea_hex):
    fea_bytes = bytes.fromhex(fea_hex)
    feature=pickle.loads(fea_bytes)
    return feature

def feature_pickle_base(feature):
    fea_pik=pickle.dumps(feature)
    fea_hex =fea_pik.hex() # tensor 序列化成bytes再转成hex字符串（16进制）
    return fea_hex