backchain.

wangjohn · Sep 20, 2012 · 8da4e61 · 8da4e61
1 parent 22088af
commit 8da4e61
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Showing 2 changed files with 8 additions and 2 deletions.
diff --git a/6.034-labs/lab1/.zookeeper.py.swp b/6.034-labs/lab1/.zookeeper.py.swp
diff --git a/6.034-labs/lab1/backchain.py b/6.034-labs/lab1/backchain.py
@@ -15,8 +15,14 @@
 
 
 def backchain_to_goal_tree(rules, hypothesis):
-    raise NotImplementedError
+    matcihypothesis
+    for rule in rules:
+        consequent = rule.consequent
+        populate(consequent, 
+        print consequent
+        if match(consequent, hypothesis): 
+            return consequent
 
 # Here's an example of running the backward chainer - uncomment
 # it to see it work:
-#print backchain_to_goal_tree(ZOOKEEPER_RULES, 'opus is a penguin')
+print backchain_to_goal_tree(ZOOKEEPER_RULES, 'opus is a penguin')