def raw(self, use_local=True):
        """Load the raw dataset from remote URL or local file

        Parameters
        ----------
        use_local : boolean
            If True (default), then attempt to load the dataset locally. If
            False or if the dataset is not available locally, then load the
            data from an external URL.
        """
        if use_local and self.is_local:
            return pkgutil.get_data('vega_datasets', self.pkg_filename)
        else:
            return urlopen(self.url).read()
Load the raw dataset from remote URL or local file

        Parameters
        ----------
        use_local : boolean
            If True (default), then attempt to load the dataset locally. If
            False or if the dataset is not available locally, then load the
            data from an external URL.