matplotlib升级到3.3.4后,程序中使用matplotlib绘图会提示"Matplotlib is currently using agg, which is a non-GUI backend, so cannot show the figure",查阅资料说是采用如下方法可以解决:

import matplotlib
matplotlib.use('TkAgg')

修改后结果提示

ModuleNotFoundError: No module named '_tkinter'

应该安装python3-tk:

sudo apt-get install python3-tk

但是python3-tk默认作为python3.5版本的库.

下载python3-tk_3.6.5-3_amd64.deb,提取/usr/lib/python3.6/lib-dynload/_tkinter.cpython-36m-x86_64-linux-gnu.so复制到相应目录即可.