liangjingtao c953e84e28 Make string.letters PY3 compatible
String.letters are removed in py3,use string.ascii_letters instead.

Change-Id: I3c71b65b09b42dc954a3eb9e02894e5d3b12a3f4
Closes-Bug: #1595786
2016-06-24 08:11:50 +00:00
..
2016-06-02 16:49:32 +00:00
2016-06-08 10:07:44 +00:00