lvgl/examples/widgets/slider/lv_example_slider_1.py

# 
# A default slider with a label displaying the current value
#
def slider_event_cb(e):

    slider = lv.slider.__cast__(e.get_target())
    slider_label.set_text("{:d}%".format(slider.get_value()))
    slider_label.align_to(slider, lv.ALIGN.OUT_BOTTOM_MID, 0, 10)

# Create a slider in the center of the display
slider = lv.slider(lv.scr_act())
slider.center()
slider.add_event_cb(slider_event_cb, lv.EVENT.VALUE_CHANGED, None)

# Create a label below the slider
slider_label = lv.label(lv.scr_act())
slider_label.set_text("0%")

slider_label.align_to(slider, lv.ALIGN.OUT_BOTTOM_MID, 0, 10)