Light an LED digit on the console using Python

led_digit.py

"""
A Python program to light an LED digit on console

Author: anandpillai@letterboxes.org

"""
import sys


class LEDMatrix(object):
    """ A simple led matrix class """

    # LED action config for numbers from 0..9
    config = { 1: [(1, 3)],
               2: [(0,1), (1, 3, 1), (0,4), (1,1,2), (0,7)],
               3: [(0,1), (1, 3, 1), (0,4), (1,3,2), (0,7)],
               4: [(1, 1, 1), (0,4), (1,3)],
               5: [(0,1), (1, 1, 1), (0,4), (1,3,2), (0,7)],
               6: [(0,1), (1, 1, 1), (0,4), (1,1,2), (1,3,2), (0,7)],
               7: [(0,1), (1, 3)],
               8: [(0,1), (1, 1), (0,4), (1,3), (0,7)],
               9: [(0,1), (1, 1, 1), (0,4), (1,3), (0,7)],
               0: [(0,1), (1, 1), (1,3), (0,7)] }

    
    def __init__(self, m, n, init=True, sep='\t', led='*'):
        if init:
            self.rows = [[0]*n for x in range(m)]
        else:
            self.rows = []
        self.m = m
        self.n = n
        # Separator gap
        self.sep = sep
        # LED character
        self.led = led
        # Action map
        self.action_map = {0: 'row_on',
                           1: 'col_on'}
        

    def __str__(self):
        s='\n'.join([self.sep + ' '.join([str(item) for item in row]) for row in self.rows])
        return s + '\n'     
        
    def col_on(self, cno, mode=0):
        """ Turn on a specific column """

        # 0=> full
        # 1 => top half
        # 2 => bottom half

        rng = { 0: range(self.m),
                1: range(self.m/2),
                2: range(self.m/2, self.m) }

        for i in rng.get(mode):
            # print row
            row = self.rows[i]
            row[cno-1] = self.led

    def row_on(self, rno):
        """ Turn on a specific row """

        row = self.rows[rno-1]
        for i in range(self.n):
            row[i] = self.led

    def blank(self):
        """ Blank the matrix """

        self.rows = [[' ']*self.n for x in range(self.m)]

    def display(self, num):
        """ Display a number on the LED Matrix """

        self.blank()

        actions = self.config.get(num)
        
        for action in actions:
            func = getattr(self, self.action_map.get(action[0]))
            args = action[1:]
            # print args
            func(*args)

        print self

class LEDPanel(object):
    """ An LED panel class using the LED matrices """
    
    def __init__(self, size=3):
        self.matrices = []
        for i in range(size):
            self.matrices.append(LEDMatrix(7, 3, sep='\t', led='0'))

    def display(self, number):
        """ Display a number """

        # Stringify it
        num_s = str(number)
        for idx,num in enumerate(num_s):
            self.matrices[idx].display(int(num))
            
        
if __name__ == "__main__":
    # m = LEDMatrix(7, 3)
    # Usage: python led_digit.py <digit>
    # Example: python led_digit.py 1
    p = LEDPanel()
    p.display(sys.argv[1])