When using matplotlib pyplot.show () image is not displayed

Recently run on jupyter notebook running the code, we found that the use of matplotlib.show () image is not displayed on the Internet looking for a bit solution, first on the reference link:

https://stackoverflow.com/questions/7534453/matplotlib-does-not-show-my-drawings-although-i-call-pyplot-show

 

The reason : matplotlib displayed depending on the configuration of the backend, when it is agg, the system does not display pictures 

Solutions are as follows :

　　1. Check the backend method matplotlib of:

1 import matplotlib
2 matplotlib.get_backend()
3 # 或者
4 # matplotlib.pyplot.get_backend()

　　2. If the display is "agg", you need to install Tkinter, set Agg method, common are: Qt4Agg Qt5Agg TkAgg WX WXAgg Agg Cairo GDK PS PDF SVG have

. 1  Import matplotlib
 2  Print matplotlib.matplotlib_fname ()
 . 3  # Display file location matplotlibrc 
4  # modify matplotlibrc following code file 
. 5 backend: youragg