ensight gold case export - surface selection

[simondhawk]

Hello,
I'm trying to export ensight gold case data.
I'm using Fluent 2025r1 (pyfluent).
I'd like to export all interior zone surfaces without inserting their names.
I've tried to write
interior_zone_surfaces='[]',
interior_zone_surfaces='[]',
interior_zone_surfaces='',
interior_zone_surfaces='(*)',
but doesn't work.
Could you help me?

# export  gold results
solver.settings.file.export.ensight_gold(
    file_name=res_export_file,
    cell_func_domain_export=['pressure', 'velocity-magnitude'],
    binary_format=False,
    cellzones='*',
    interior_zone_surfaces=**?????**,
    cell_centered=False)

Many thanks

Simone