解决 json.dump 报错：TypeError - Object of type xxx is not JSON serializable

class MyEncoder(json.JSONEncoder):
    def default(self, obj):
        if isinstance(obj, np.integer):
            return int(obj)
        elif isinstance(obj, np.floating):
            return float(obj)
        elif isinstance(obj, np.ndarray):
            return obj.tolist()
        if isinstance(obj, time):
            return obj.__str__()
        else:
            return super(MyEncoder, self).default(obj)

json.dump(final_json, fp, indent=3, cls= MyEncoder)