步驟參考:https://github.com/hsekia/learning-keras/wiki/How-to-install-Keras-to-Ubuntu-18.04
說明:裝tensorflow和Keras的時候慢可以用清華源加速
sudo pip3 install -i https://pypi.tuna.tsinghua.edu.cn/simple tensorflow 清華源加速
sudo pip3 install -i https://pypi.tuna.tsinghua.edu.cn/simple keras