环境：
python3.5.2
Anaconda:4.1.1
错误：pip install PyQt5导入包时提示错误（ ImportError: DLL load failed: 找不到指定的模块）
如下图所示
解决办法：
目前不支持用pip安装PyQt5，请用conda来安装，命令为：conda install pyqt
Please use conda packages to install PyQt5. We don't support pip packages for it right now.
参见：https://github.com/ContinuumIO/anaconda-issues/issues/1394