A very simple VirtualLCD implementation (based on the VirtualDOM) for LCD Displays

Display.py

from RPi import GPIO
from RPLCD.gpio import CharLCD

# Configure GPIO
GPIO.setwarnings(False)
GPIO.setmode(GPIO.BOARD)

class Display:
  def __init__(
    self,
    cols,
    rows,
    pin_rs=15,
    pin_e=16,
    pins_data=[21,22,23,24],
    numbering_mode=GPIO.BOARD
  ):
    # Store some of the config we'll need later
    self.WIDTH = cols
    self.HEIGHT = rows

    # Setup our VirtualLCD Screen
    self.virtual_rows = [""] * rows

    # Setup the LCD Screen
    self.LCD = CharLCD(
      cols=cols,
      rows=rows,
      pin_rs=pin_rs,
      pin_e=pin_e,
      pins_data=pins_data,
      numbering_mode=numbering_mode,
      auto_linebreaks=True
    )

  def write(self, row, string):
    for i, char in enumerate(string.ljust(self.WIDTH, " ")):
      if (len(self.virtual_rows[row]) <= i or self.virtual_rows[row][i] != char):
        self.LCD.cursor_pos = (row, i)
        self.LCD.write_string(char)

    self.virtual_rows[row] = string