Character LCD Hello World using RPLCD

lcd_hello_world.py

#!/usr/bin/env python3

"""
Tested on a Raspberry Pi 3b+ running Raspbian 11 with i2c enabled via raspi-config, Python 3.9.2 and RPLCD 1.3.0.

Display under test is an HD44780 character LCD from Adafruit (https://www.adafruit.com/product/198)
soldered to an i2c backpack (https://www.adafruit.com/product/292). Display's i2c address located with `i2cdetect -y 1`.
"""

from RPLCD import i2c

import string
from time import sleep

lcdmode = 'i2c'
cols = 20
rows = 4
charmap = 'A00'
i2c_expander = 'MCP23008'

address = 0x20
port = 1

lcd = i2c.CharLCD(i2c_expander, address, port=port, charmap=charmap, cols=cols, rows=rows)

text = (string.ascii_letters + string.digits + string.punctuation)[:cols * rows]

i = 0

lcd.backlight_enabled = True

while True:
  lcd.write_string(f"Hello World (Iter {i})")
  lcd.crlf()
  lcd.write_string('No bricks here :-)')
  sleep(2)
  lcd.clear()
  
  text_offset = 0
  for row in range(rows):
    lcd.write_string(text[text_offset:text_offset + cols])
    lcd.crlf()
    text_offset += cols

  sleep(5)
  lcd.clear()
  i += 1