From e84e1d2df6c782f10b0f2fe24256aaa6f393ffe9 Mon Sep 17 00:00:00 2001
From: Jonathan Frederic <jdfreder@calpoly.edu>
Date: Fri, 1 Nov 2013 21:15:28 +0000
Subject: [PATCH] Fixed button on_click handler so it's initiated on
 instanciation

---
 IPython/html/widgets/widget_button.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/IPython/html/widgets/widget_button.py b/IPython/html/widgets/widget_button.py
index 9883038e9..f68767001 100644
--- a/IPython/html/widgets/widget_button.py
+++ b/IPython/html/widgets/widget_button.py
@@ -33,7 +33,10 @@ class ButtonWidget(Widget):
     description = Unicode('', help="Description of the button (label).")
     disabled = Bool(False, help="Enable or disable user changes.")
     
-    _click_handlers = []
+
+    def __init__(self, **kwargs):
+        self._click_handlers = []
+        super(ButtonWidget, self).__init__(**kwargs)
 
 
     def on_click(self, callback, remove=False):