def event_handler(e):
    code = e.get_code()
    obj = e.get_target()
    if code == lv.EVENT.VALUE_CHANGED: 
        option = " "*10 # should be large enough to store the option
        obj.get_selected_str(option, len(option))
        # .strip() removes trailing spaces
        print("Option: \"%s\"" % option.strip())

# Create a normal drop down list
dd = lv.dropdown(lv.scr_act())
dd.set_options("\n".join([
    "Apple",
    "Banana",
    "Orange",
    "Cherry",
    "Grape",
    "Raspberry",
    "Melon",
    "Orange",
    "Lemon",
    "Nuts"]))

dd.align(lv.ALIGN.TOP_MID, 0, 20)
dd.add_event_cb(event_handler, lv.EVENT.ALL, None)