echo 0 > /sys/class/backlight/rpi_backlight/bl_power

echo 1 > /sys/class/backlight/rpi_backlight/bl_power

echo n > /sys/class/backlight/rpi_backlight/brightness

>>> import rpi_backlight as bl
>>> bl.set_brightness(255)
>>> bl.set_brightness(20, smooth=True, duration=3)
>>> bl.get_max_brightness()
255
>>> bl.get_actual_brightness()
20
>>> bl.get_power()
True
>>> bl.set_power(False)