def create_buttons(**buttons):
    return [RadioField(name, choices=choices) for name, choices in buttons.items()]


buttons_dict = {
    'butname1': [
        ('name1.1', 'val1.1'),
        ('name1.2', 'val1.2')
    ],

    'butname2': [
        ('name2.1', 'val2.1')
    ],
}


print(create_buttons(**buttons_dict))