From afffd380f405015bf490acf212a57ea4322a1170 Mon Sep 17 00:00:00 2001
From: Yao <psyyz10@gmail.com>
Date: Wed, 29 Mar 2017 03:21:26 +0800
Subject: [PATCH 1/2] add some python doc


From b5667da38380ba46c647371e21283ea64dbc1dfd Mon Sep 17 00:00:00 2001
From: Yao <psyyz10@gmail.com>
Date: Fri, 31 Mar 2017 07:42:09 +0800
Subject: [PATCH 2/2] add more comments

add more python doc

fix scala style