From 1f83e7ae4ee42dcee099c1563874b501e2510cc9 Mon Sep 17 00:00:00 2001
From: Noam Meltzer <tsnoam@gmail.com>
Date: Mon, 25 Apr 2016 10:44:55 +0300
Subject: [PATCH] dispatcher.addHandler(): validate value of group is int

---
 telegram/ext/dispatcher.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/telegram/ext/dispatcher.py b/telegram/ext/dispatcher.py
index 5b21abfec..a381d20c9 100644
--- a/telegram/ext/dispatcher.py
+++ b/telegram/ext/dispatcher.py
@@ -220,6 +220,8 @@ class Dispatcher(object):
         if not isinstance(handler, Handler):
             raise TypeError(
                 'handler is not an instance of {0}'.format(Handler.__name__))
+        if not isinstance(group, int):
+            raise TypeError('group is not int')
 
         if group not in self.handlers:
             self.handlers[group] = list()