Trees don't have values

Trees don't actually need a value.  I can make a subclass later if I
find it's important.

libsaria/trees.py

@@ -3,15 +3,17 @@
 from libsaria.path import sep
 
 class Tree(dict):
-	def __init__(self, value = None):
-		#self.children = dict()
-		self.value    = value
+	def __init__(self):
+		dict.__init__(self)
+
+	def __disp__(self, level):
+		return "%s (%s)", (child, self[child].value)
 
 	def disp(self, level = 0):
-		#children = self.children
 		for child in self:
-			space = "  " * level
-			print space, "%s (%s)" % (child, self[child].value)
+			space     = "  " * level
+			fmt, vals = self.__disp__(level)
+			print space, fmt % vals
 			self[child].disp(level + 1)
 
 	def walk(self):
@@ -26,18 +28,18 @@ class Tree(dict):
 			for res in child.walk():
 				yield [key] + res
 
-	def insert(self, path, values=[]):
+	def __insert__(self, path):
 		path_part = path[0]
-		value = path_part
-		if len(values) > 0:
-			value  = values[0]
-			values = values[1:]
-		child = self.get(path_part, None)
+		child     = self.get(path_part, None)
 		if child == None:
-			child = self.__class__(value)
+			child = self.__class__()
 			self[path_part] = child
+		return child
+
+	def insert(self, path):
+		child = self.__insert__(path)
 		if len(path) > 1:
-			child.insert(path[1:], values)
+			child.insert(path[1:])
 
 
 class FSTree(Tree):