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Sierpinski triangles
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| """ | |
| Usage: test.py [l|c|r] <n> | |
| Print a Sierpinski's Gasket of iteration n, left, center, or right-aligned (accordingly) | |
| """ | |
| import string, sys | |
| def sierpinski(n, c): | |
| gasket = [c] | |
| for i in range(1, n+1): | |
| gasket += ['{0}{0:>{1}}'.format(j, 2**i) for j in gasket] | |
| return gasket | |
| if __name__ == '__main__': | |
| just, char = {'l': (string.ljust, 'L'), | |
| 'c': (string.center, 'A'), | |
| 'r': (string.rjust, 'J') | |
| }[sys.argv[1]] | |
| n = int(sys.argv[2]) | |
| gasket = sierpinski(n, char) | |
| print '\n'.join(just(r, 2**(n+1)) for r in gasket) |
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