UserWarning: Matplotlib is currently using agg, which is a non-GUI backend, so cannot show the figure

 

>>> 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

>>> matplotlib.get_backend()

'agg'

>>> matplotlib.use('TkAgg')