UserWarning: Matplotlib is currently using agg, which is a non-GUI backend, so cannot show the figur_backend tkagg is interactive backend. turning inte

1、问题：Backend TkAgg is interactive backend. Turning interactive mode on.

matplotlib的默认backend是TkAgg，而FltkAgg, GTK, GTKAgg, GTKCairo, TkAgg , Wx or WxAgg这几个backend都要求有GUI图形界面的。

import matplotlib.pyplot as plt
Backend TkAgg is interactive backend. Turning interactive mode on.
 
plt.get_backend()
Out[3]: u'TkAgg'

解决方法：指定不需要GUI的backend（Agg, Cairo, PS, PDF or SVG）

import matplotlib.pyplot as plt
plt.switch_backend('agg')

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

解决方案：

import matplotlib

matplotlib.use('TkAgg')

参考：

https://www.icode9.com/content-4-32530.html

https://blog.csdn.net/neninee/article/details/87972040#commentsedit