From fdac8f30fd825e3f359e7cdfc6463829042699da 2013-08-08 01:31:14
From: Jonathan Frederic <jdfreder@calpoly.edu>
Date: 2013-08-08 01:31:14
Subject: [PATCH] Simplify

---

diff --git a/IPython/nbconvert/nbconvertapp.py b/IPython/nbconvert/nbconvertapp.py
index 72a4256..912913a 100755
--- a/IPython/nbconvert/nbconvertapp.py
+++ b/IPython/nbconvert/nbconvertapp.py
@@ -160,8 +160,9 @@ class NbConvertApp(BaseIPythonApplication):
     writer_factory = Type()
 
     def _writer_class_changed(self, name, old, new):
-        if new.lower() in self.writer_aliases:
-            new = self.writer_aliases[new.lower()]
+        new = new.lower()
+        if new in self.writer_aliases:
+            new = self.writer_aliases[new]
         self.writer_factory = import_item(new)
 
     # Post-processor specific variables
@@ -177,8 +178,9 @@ class NbConvertApp(BaseIPythonApplication):
     post_processor_factory = Type()
 
     def _post_processor_class_changed(self, name, old, new):
-        if new.lower() in self.post_processor_aliases:
-            new = self.post_processor_aliases[new.lower()]
+        new = new.lower()
+        if new in self.post_processor_aliases:
+            new = self.post_processor_aliases[new]
         if new:
             self.post_processor_factory = import_item(new)