Inline

By default, all form items are laid out vertically (top to bottom). For more complex forms though, this might not be enough and that's where ui.inline comes into play. All you need to do is specify the items attribute, which accepts any form component. Optionally, you can also specify justify if you want to control the alignment too.

q.page['form'] = ui.form_card(
    box='1 1 4 2',
    items=[ui.inline(items=[
        ui.textbox(name='textbox1', label='Textbox 1'),
        ui.textbox(name='textbox2', label='Textbox 2'),
        ui.textbox(name='textbox3', label='Textbox 3'),
    ])],
)

Check the full API at ui.inline.