From 5902725be208fa805862bf92229d196b0f676b33 2012-03-08 22:53:09
From: MinRK <benjaminrk@gmail.com>
Date: 2012-03-08 22:53:09
Subject: [PATCH] nbjson.writes always returns unicode

---

diff --git a/IPython/nbformat/v3/nbjson.py b/IPython/nbformat/v3/nbjson.py
index 558a613..5c63a4e 100644
--- a/IPython/nbformat/v3/nbjson.py
+++ b/IPython/nbformat/v3/nbjson.py
@@ -24,6 +24,8 @@ from .rwbase import (
     NotebookReader, NotebookWriter, restore_bytes, rejoin_lines, split_lines
 )
 
+from IPython.utils import py3compat
+
 #-----------------------------------------------------------------------------
 # Code
 #-----------------------------------------------------------------------------
@@ -56,7 +58,7 @@ class JSONWriter(NotebookWriter):
         kwargs['separators'] = (',',': ')
         if kwargs.pop('split_lines', True):
             nb = split_lines(copy.deepcopy(nb))
-        return json.dumps(nb, **kwargs)
+        return py3compat.str_to_unicode(json.dumps(nb, **kwargs), 'utf-8')
     
 
 _reader = JSONReader()