Initial addition of Python scripts

description.py

@@ -0,0 +1,56 @@
+import logging
+from workspaceStructure import WorkspaceStructure
+
+class Description(WorkspaceStructure):
+	def __init__(self,workspaceObject,descriptionType,descriptor):
+		WorkspaceStructure.__init__(self)
+		self.object = workspaceObject
+		self.string = workspaceObject.string
+		self.descriptionType = descriptionType
+		self.descriptor = descriptor
+
+	def __repr__(self):
+		return '<Description: %s>' % self.__str__()
+
+	def __str__(self):
+		s = 'description(%s) of %s' % (self.descriptor.get_name(),self.object)
+		from workspace import workspace
+		if self.object.string == workspace.initial:
+			s += ' in initial string'
+		else:
+			s += ' in target string'
+		return s
+
+	def updateInternalStrength(self):
+		self.internalStrength = self.descriptor.conceptualDepth
+
+	def updateExternalStrength(self):
+		self.externalStrength = (self.localSupport() + self.descriptionType.activation) / 2
+
+	def localSupport(self):
+		from workspace import workspace
+		supporters = 0 # number of objects in the string with a descriptionType like self
+		for other in workspace.otherObjects(self.object):
+			if not ( self.object.isWithin(other) or other.isWithin(self.object) ):
+				for description in other.descriptions:
+					if description.descriptionType == self.descriptionType:
+						supporters += 1
+		results = { 0:0.0, 1:20.0, 2:60.0, 3:90.0 }
+		if supporters in results:
+			return results[supporters]
+		return 100.0
+
+	def build(self):
+		self.descriptionType.buffer = 100.0
+		self.descriptor.buffer = 100.0
+		if not self.object.hasDescription(self.descriptor):
+			logging.info('Add %s to descriptions' % self)
+			self.object.descriptions += [ self ]
+
+	def breakDescription(self):
+		from workspace import workspace
+		if self in workspace.structures:
+			workspace.structures.remove(self)
+		self.object.descriptions.remove(self)
+
+