cell auto test | Python Fiddle

#!/usr/bin/env python

import sys

def display_cell(cell):
    return '*' if cell else '-'

def print_row(row):
    print ''.join([display_cell(cell) for cell in row])

def generate_next_cell(row, cellnum):
    lvalue = row[cellnum - 1] if cellnum > 0 else False
    rvalue = row[cellnum + 1] if cellnum < len(row) - 1 else False
    return lvalue != rvalue # same as logical XOR, which is what we want

def generate_next_row(row):
    return [generate_next_cell(row, num) for num in xrange(len(row))]

if __name__ == "__main__":
    import argparse
    parser = argparse.ArgumentParser(description = "Cellular Automata")
    parser.add_argument('--print-ruler', default=False, action="store_true", 
                        help="print a ruler for debugging")
    args = parser.parse_args()

row = [False] * 64
    row[31] = True

ruler = '0123456789' * 7
    if args.print_ruler:
        print ruler

print_row(row)
    for rownum in xrange(32):
        row = generate_next_row(row)
        print_row(row)

if args.print_ruler:
        print ruler

sys.exit(0)

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