think_complexity: ch7ex2.py annotate

Follow up to last commit. Re-orient the r-pentomino. Added progress display.

rev	line source
bgneal@47	1 """Chapter 7, exercise 2 in Allen Downey's Think Complexity book.
bgneal@47	2
bgneal@47	3 Start with an r-pentomino as an initial condition and confirm that the results
bgneal@47	4 are consistent with the description above. You might have to adjust the size of
bgneal@47	5 the grid and the boundary behavior.
bgneal@47	6
bgneal@47	7 """
bgneal@47	8 import Life
bgneal@47	9
bgneal@47	10
bgneal@47	11 class RPentomino(Life.Life):
bgneal@47	12
bgneal@47	13 def __init__(self, n):
bgneal@48	14 super(RPentomino, self).__init__(n, mode='constant', cval=0,
bgneal@48	15 random=False, show_progress=10)
bgneal@47	16
bgneal@47	17 i, j = n / 2, n / 2
bgneal@47	18 self.array[i, j] = 1
bgneal@47	19 self.array[i, j - 1] = 1
bgneal@48	20 self.array[i + 1, j] = 1
bgneal@48	21 self.array[i + 1, j + 1] = 1
bgneal@47	22 self.array[i - 1, j] = 1
bgneal@48	23
bgneal@47	24
bgneal@47	25 if __name__ == '__main__':
bgneal@47	26 life = RPentomino(150)
bgneal@47	27 viewer = Life.LifeViewer(life, delay=1)
bgneal@47	28 viewer.animate(steps=1200)

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