def export_obj(filename, cutout, level=<NUM_LIT:0>):
if "<STR_LIT>" not in filename:<EOL><INDENT>filename = filename + "<STR_LIT>"<EOL><DEDENT>vs, fs = mcubes.marching_cubes(cutout, level)<EOL>mcubes.export_obj(vs, fs, filename)<EOL>
Converts a dense annotation to a obj, using Marching Cubes (PyMCubes).

Arguments:
    filename (str): The filename to write out to
    cutout (numpy.ndarray): The dense annotation
    level (int): The level at which to run mcubes

Returns:
    boolean success