一、Q:安装好了tensorflow-gpu版本，cuda也安好了，但是检测不到GPU。
A：使用pip安装，不要使用conda安装即可
二、pip install tensorflow时显示如下错误，开始以为是ssl证书的问题，机上trust也不行。此时可以试试关掉梯子。
Could not fetch URL https://pypi.org/simple/tensorflow/: There was a problem confirming the ssl certificate: HTTPSConnectionPool(host=‘pypi.org’, port=443): Max retries exceeded with url: /simple/tensorflow/ (Caused by SSLError(SSLEOFError(8, ‘EOF occurred in violation of protocol (_ssl.c:1131)’))) - skipping
