先前基础：Pycharm已经下载完成，Anaconda环境已经创建好。打开Pycharm, file-setting-project-python interpreter:点击右上角齿轮-add-conda environment看exiting environment。应为我自己创建的环境已经被添加过了，所以这里显示不出来。没添加前显示的是：Python3.7/home/anaconda3/en

pip 安装cv2的时候遇到numpy版本不合适的报错：Could not find a version that satisfies the requirement numpy==1.13.3 (from versions: 1.14.5, 1.14.6, 1.15.0rc2, 1.15.0, 1.15.1, 1.15.2, 1.15.3, 1.15.4, 1.16.0rc1, 1.16.0rc