From 283dc68a5fbf02f3564d27716c6703a478bf26ad Mon Sep 17 00:00:00 2001
From: Yuya Unno <unnonouno@gmail.com>
Date: Wed, 14 Jun 2017 23:42:14 +0900
Subject: [PATCH] Merge pull request #2852 from
 chainer/check-none-hyperparam-proxy-descriptor

Check for None in HyperparameterProxy descriptor
---
 chainer/optimizer.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/chainer/optimizer.py b/chainer/optimizer.py
index 7973dd585d3f..cff627205008 100644
--- a/chainer/optimizer.py
+++ b/chainer/optimizer.py
@@ -595,6 +595,8 @@ def __init__(self, attr_name):
         self.__doc__ = 'Alias to ``self.hyperparam.{}``'.format(attr_name)
 
     def __get__(self, obj, type=None):
+        if obj is None:
+            return self
         return getattr(obj.hyperparam, self._attr_name)
 
     def __set__(self, obj, value):