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

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>>> plt.show()

__main__:1: UserWarning: Matplotlib is currently using agg, which is a non-GUI backend, so cannot show the figure.

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原因：

发现发生在 coco.py 文件

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处理办法：

import matplotlib

>>> matplotlib.get_backend()

‘agg‘

>>> matplotlib.use(‘TkAgg‘)

原文：https://www.cnblogs.com/xiexiaokui/p/12237910.html