Something

<pyvcp>
<table flexible_rows="[1]" flexible_columns="[2]">
    <tablesticky sticky="nsew"/>
    <tablerow/>
        <label bg="red" width="4"/>
        <label bg="green" width="4"/>
    <tablerow/>
        <label bg="blue" width="4"/>
        <label bg="white" width="4"/>
</table>
</pyvcp>