Clock on a Rpi with a 4x20 LCD on I2C port

lcd_clock.py

#!/usr/bin/env python3

import time
import schedule
import RPi_I2C_LCD

# global var
lcd = RPi_I2C_LCD.LCD()

def update_lcd():
    # l2
    lcd.set_cursor(row=1)
    lcd.message(time.strftime('%d/%m/%Y  %H:%M:%S', time.localtime()))

if __name__ == '__main__':
    # init LCD screen
    lcd.set_backlight(True)
    lcd.home()
    schedule.every(1).second.do(update_lcd)
    # main loop
    while True:
      schedule.run_pending()
      time.sleep(.5)