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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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class Vertex (object):
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	def __init__ (self, label='', value=0, shape='circle'):
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		self.label = label
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		self.value = value
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		self.shape = shape
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class Edge (object):
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class Edge (object):
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	def __init__ (self, color='black', label=''):
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	def __init__ (self, color='black', label=''):
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		self.color = color
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		self.color = color
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		self.label = label
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		self.label = label
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					if i != v:
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					if i != v:
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						children.add (i)
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						children.add (i)
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		return list(children)
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		return list(children)
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	def set_vertex_value (self, v, data):
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	def set_vertex_value (self, v, value):
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		"""Store some data at a vertex"""
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		"""Store some data at a vertex"""
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		self.vertices[v] = data
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		self.vertices[v] = Vertex(str(v), value)
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	def get_vertex_value (self, v):
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	def get_vertex_value (self, v):
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		"""Get the data at a vertex"""
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		"""Get the data at a vertex"""
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		return self.vertices[v]
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		return self.vertices[v].value
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	def set_vertex_shape (self, v, shape):
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		self.vertices[v].shape = shape
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	def get_vertex_shape (self, v):
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		return self.vertices[v].shape
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	def set_edge_color (self, v1, v2, color):
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	def set_edge_color (self, v1, v2, color):
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		if not self.has_edge (v1, v2):
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		if not self.has_edge (v1, v2):
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			raise ValueError
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			raise ValueError
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