From 787715411522954660e9235c7eebe8eb896bc498 Mon Sep 17 00:00:00 2001
From: Timotej Lazar <timotej.lazar@araneo.org>
Date: Tue, 22 Sep 2015 15:51:10 +0200
Subject: Add Node.subtrees and Node.leaves functions

---
 monkey/graph.py | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/monkey/graph.py b/monkey/graph.py
index c69d55c..7f02c60 100644
--- a/monkey/graph.py
+++ b/monkey/graph.py
@@ -19,6 +19,21 @@ class Node(object):
             nodes += n.preorder()
         return nodes
 
+    # Return a list of subtrees of [self].
+    def subtrees(self):
+        yield self
+        for child in self.eout:
+            yield from child.subtrees()
+
+    # Return the list of leaves' values (left-to-right).
+    def terminals(self):
+        if not self.eout:
+            return [self.data]
+        terminals = []
+        for child in self.eout:
+            terminals.extend(child.terminals())
+        return terminals
+
     # Return a one-line string representation of [self].
     def __str__(self):
         return '(' + str(self.data) + ' ' + \
-- 
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