Select the named option from select with label (recommended), name or id.

def select_single_item(self, option_name, select_name):
    """
    Select the named option from select with label (recommended), name or id.
    """
    option_box = find_option(world.browser, select_name, option_name)
    assert option_box, "Cannot find option '{}'.".format(option_name)
    option_box.click()