def load_mtx(mtx_file, cell_axis='row', gene_names=None, cell_names=None,
    sparse=None):
    """magic.io is deprecated. Please use scprep.io instead.
       Read more at http://scprep.readthedocs.io/
    """
    raise RuntimeError(
        'magic.io is deprecated. Please use scprep.io instead. Read more at http://scprep.readthedocs.io'
        , FutureWarning)
