def vertex_indices_from_edges_tuple(bm, edge_tuple):
    """Return List of vertices.

    Args:
        bm:           Active object's Bmesh
        edge_tuple:   contains 2 edge indices.

    Returns:
        The vertex indices of edge_tuple as an Integer list.
    """

    def find_verts(ind_v, ind_w):
        return bm.edges[edge_tuple[ind_v]].verts[ind_w].index

    return [find_verts(i >> 1, i % 2) for i in range(4)]