storage.py 文件源码

def _get_head_of_matrix(self):
        try:
            hdf = pandas.HDFStore(self.matrix_path)
            key = hdf.keys()[0]
            head_of_matrix = hdf.select(key, start=0, stop=1)
            head_of_matrix.set_index(self.metadata['indices'], inplace=True)
            self._head_of_matrix = head_of_matrix
        except pandas.error.EmptyDataError:
            self._head_of_matrix = None