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__author__    = "Ira W. Snyder (devel@irasnyder.com)"
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__author__    = "Ira W. Snyder (devel@irasnyder.com)"
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__copyright__ = "Copyright (c) 2006 Ira W. Snyder (devel@irasnyder.com)"
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__copyright__ = "Copyright (c) 2006 Ira W. Snyder (devel@irasnyder.com)"
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__license__   = "GNU GPL v2 (or, at your option, any later version)"
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__license__   = "GNU GPL v2 (or, at your option, any later version)"
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# Fix for the lame version of python on the school's computers (v2.1)
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try:
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	(True, False)
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except NameError:
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	(True, False) = (1, 0)
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class PuzzlePiece:
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class PuzzlePiece (object):
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	EMPTY = 'E'
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	EMPTY = 'E'
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	(UP, DOWN, LEFT, RIGHT) = ('up', 'down', 'left', 'right')
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	(UP, DOWN, LEFT, RIGHT) = ('up', 'down', 'left', 'right')
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	def __init__ (self, state, depth=0, goal=None, generated_by='root'):
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	def __init__ (self, state, depth=0, goal=None, generated_by='root'):
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		if len(state) != 9:
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		if len(state) != 9:
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			raise ValueError
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			raise ValueError
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		for i in xrange (len (self.state)):
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		for i in xrange (len (self.state)):
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			if self.state[i] == value:
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			if self.state[i] == value:
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				return i
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				return i
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		raise ValueError
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		raise ValueError
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	def move (self, empty_pos, direction):
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	def move (self, empty_pos, direction):
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		val = 0
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		val = 0
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		if direction == self.UP:
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		if direction == self.UP:
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			val = -3
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			val = -3