[ ERROR] THESE PACKAGES DO NOT MATCH THE HASHES FROM THE REQUIREMENTS FILE

pip 安装 tensorflow 出现以下错误：

ERROR: THESE PACKAGES DO NOT MATCH THE HASHES FROM THE REQUIREMENTS FILE. If you have updated the package versions, please update the hashes. Otherwise, examine the package contents carefully; someone may have tampered with them. tensorflow<1.14,>=1.13 from https://www.piwheels.org/simple/tensorflow/tensorflow-1.13.1-cp35-none-linux_armv7l.whl#sha256=6c00dd13db0791e83cb08d532f007cc7fd44c8d7b52662a4a0065ac4fe7ca18a (from mycroft-precise==0.3.0): Expected sha256 6c00dd13db0791e83cb08d532f007cc7fd44c8d7b52662a4a0065ac4fe7ca18a Got f679035a7cd96d24f826463bef208cd04f1eee50eb6023a158c05b529e17a71b

上述报错显示，下载包时期望得到 hash 值不是真正的 hash，pip 安装时包出现损坏，又可能时自身网络问题或者Python包的版本兼容性

解决方法：pip 包安装时添加一个--no-cahce-dir 即可解决如下：

pip install tensorflow --no-cache-dir