Form / Picker / Selection
Pre-select choices while displaying a picker.
from h2o_wave import main, app, Q, ui
@app('/demo')
async def serve(q: Q):
    if q.args.show_inputs:
        q.page['example'].items = [
            ui.text(f'selected={q.args.picker}'),
            ui.button(name='show_form', label='Back', primary=True),
        ]
    else:
        q.page['example'] = ui.form_card(box='1 1 4 5', items=[
            ui.picker(name='picker', label='Picker with initial values', choices=[
                ui.choice(name='spam', label='Spam'),
                ui.choice(name='eggs', label='Eggs'),
                ui.choice(name='ham', label='Ham'),
                ui.choice(name='cheese', label='Cheese'),
                ui.choice(name='beans', label='Beans'),
                ui.choice(name='toast', label='Toast'),
            ], values=['spam', 'eggs']),
            ui.button(name='show_inputs', label='Submit', primary=True),
        ])
    await q.page.save()