From a9bd9ec051e1b57c608e8da7ebecdd1aab05ab2c 2013-07-15 23:15:34
From: Jonathan Frederic <jdfreder@calpoly.edu>
Date: 2013-07-15 23:15:34
Subject: [PATCH] Only set name if it doesn't exist!

---

diff --git a/IPython/nbconvert/exporters/exporter.py b/IPython/nbconvert/exporters/exporter.py
index a276c1e..691b631 100755
--- a/IPython/nbconvert/exporters/exporter.py
+++ b/IPython/nbconvert/exporters/exporter.py
@@ -371,8 +371,8 @@ class Exporter(Configurable):
                 resources['metadata'] = ResourcesDict(resources['metadata'])
         else:
             resources['metadata'] = ResourcesDict()
-            resources['metadata']['name'] = 'Notebook'
-            resources['metadata']['modified_date'] = ''
+            if not resources['metadata']['name']: 
+                resources['metadata']['name']: = 'Notebook'
 
         #Set the output extension
         resources['output_extension'] = self.file_extension