Backend Qt5Agg is interactive backend. Turning interactive mode on.

运行程序时突然出现下面错误

Backend Qt5Agg is interactive backend. Turning interactive mode on.

查找后发现解决办法：
　第一种：将matplotlib的backend设置为非交互式。

D:\Anaconda3\envs\[your environment]\Lib\site-packages\matplotlib\mpl-data\matplotlibrc

## You can also deploy your own backend outside of matplotlib by
## referring to the module name (which must be in the PYTHONPATH) as
## 'module://my_backend'.
#backend      : Agg
backend      : Agg

参考matplotlibrc 

　如果不行，第二种：pip install opencv-python。

参考mpl-backend，matplotlib.org