Load data in the main dataframe from json

        :param filepath: url of the csv file to load,
                                         can be absolute if it starts with ``/``
                                         or relative if it starts with ``./``
        :type filepath: str

        :param kwargs: keyword arguments to pass to
                                                   Pandas ``read_json`` function

        :example: ``ds.load_json("./myfile.json")``

def load_json(self, path, **kwargs):
        """Load data in the main dataframe from json

        :param filepath: url of the csv file to load,
                                         can be absolute if it starts with ``/``
                                         or relative if it starts with ``./``
        :type filepath: str

        :param kwargs: keyword arguments to pass to
                                                   Pandas ``read_json`` function

        :example: ``ds.load_json("./myfile.json")``
        """
        try:
            df = pd.read_json(path, **kwargs)
            self.df = df
        except Exception as e:
            self.err(e, "Can not load json")