def METHOD_NAME(galfile):
    """
    Sparse scipy matrix for w from a gal file.
    Parameters
    ----------
    galfile  : string
               name of gal file including suffix
    Returns
    -------
    spw      : sparse_matrix
               scipy sparse matrix in CSR format
    ids      : array
               identifiers for rows/cols of spw
    Examples
    --------
    >>> import libpysal
    >>> spw = libpysal.weights.spw_from_gal(libpysal.examples.get_path("sids2.gal"))
    >>> spw.sparse.nnz
    462
    """
    return ps_open(galfile, "r").read(sparse=True)