Magma5

from lcd_api import LcdApi
import sys

class LcdEmulator(LcdApi):
    """Implements a HD44780 character LCD connected via PCF8574 on I2C."""
    def __init__(self, num_lines, num_columns):
        LcdApi.__init__(self, num_lines, num_columns)

    def _clear_data(self):
        self.data = [0] * self.num_lines * self.num_columns