面朝大海，春暖华开

摘要： >>> plt.show() __main__:1: UserWarning: Matplotlib is currently using agg, which is a non-GUI backend, so cannot show the figure. 原因： 发现发生在 coco.py 文件 处理办法： import matplotlib >>> ma... 阅读全文

摘要： 更新pip为20后不显示下载链接无法离线下载回退pip版本 先看log WARNING: You are using pip version 19.3.1; however, version 20.0.2 is available. You should consider upgrading via the 'python -m pip install --upgrade pip' command... 阅读全文