Pycharm import RuntimeWarning after updating to 2016.2

错误信息：

RuntimeWarning: Parent module 'tests' not found while handling absolute import 
import unittest
RuntimeWarning: Parent module 'tests' not found while handling absolute import 
import datetime as dt

问题修复办法：
~\JetBrains\PyCharm Community Edition 2016.2\helpers\pycharm
用老版本的utrunner.py替换新版本的utrunner.py

下载地址：
https://youtrack.jetbrains.com/_persistent/utrunner.py?file=74-332199&c=true