From bd4fcf7960d341430c782bbb046f51cb41c3ba76 2016-01-05 16:36:36
From: Min RK <benjaminrk@gmail.com>
Date: 2016-01-05 16:36:36
Subject: [PATCH] ensure deprecated_subcommands is defined

on the base Application class

cased AttributeError on subclasses other than TerminalIPythonApp
---

diff --git a/IPython/core/application.py b/IPython/core/application.py
index 07a393a..86cfdcd 100644
--- a/IPython/core/application.py
+++ b/IPython/core/application.py
@@ -194,7 +194,9 @@ class BaseIPythonApplication(Application):
     #-------------------------------------------------------------------------
     # Various stages of Application creation
     #-------------------------------------------------------------------------
-
+    
+    deprecated_subcommands = {}
+    
     def initialize_subcommand(self, subc, argv=None):
         if subc in self.deprecated_subcommands:
             import time