GPU版本
pip install --upgrade https://storage.googleapis.com/tensorflow/windows/gpu/tensorflow_gpu-0.12.1-cp35-cp35m-win_amd64.whl --index https://pypi.mirrors.ustc.edu.cn/simple/
如果出现以下错误，可以通过--index指定镜像源
raise ReadTimeoutError(self._pool, None, 'Read timed out.')pip._vendor.requests.packages.urllib3.exceptions.ReadTimeoutError: HTTPSConnectionPool(host='pypi.python.org', port=443): Read timed out.
