（2019.6.24已解决）Tendorflow安装出错： Could not find a version that satisfies the requirement grpcio>=1.8.6

Could not find a version that satisfies the requirement grpcio>=1.8.6
No matching distribution found for grpcio>=1.8.6 (from tensorflow)

问题是因为tensorflow与python4.7不兼容，好消息是目前Tensorflow已经兼容Python3.7了，先更新一下Numpy，然后直接pip安装就可以。