From 2de218d56ff661a9689fb0c47a384dbb1f20e929 Mon Sep 17 00:00:00 2001
From: "W. Trevor King" <wking@drexel.edu>
Date: Tue, 17 Aug 2010 20:38:48 -0400
Subject: [PATCH] Handle 'None' in YAML Directions.

---
 cookbook/cookbook.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/cookbook/cookbook.py b/cookbook/cookbook.py
index fdfae2c..24a70fe 100644
--- a/cookbook/cookbook.py
+++ b/cookbook/cookbook.py
@@ -353,6 +353,8 @@ class Directions (list):
                                             for paragraph in self]))
 
     def from_yaml(self, string):
+        if string == None:
+            return
         while len(self) > 0:
             self.pop()
         for paragraph in string.split('\n\n'):
-- 
2.26.2