%matplotlib inline是什么？

Question

import matplotlib.pyplot as plt   # Import matplotlib
# This line is necessary for the plot to appear in a Jupyter notebook
%matplotlib inline
# Control the default size of figures in this Jupyter notebook
%pylab inline
pylab.rcParams['figure.figsize'] = (15, 9)   # Change the size of plots

上面的代码片段

#开头的是注释
 %matplotlib inline
 %pylab inline
 
 这两行是什么呢？

Answer 1

以% 或者 %% 开头的是魔法命令

# This is a bit of magic to make matplotlib figures appear inline in the notebook
# rather than in a new window.
%matplotlib inline

Answer 2

This line is necessary for the plot to appear in a Jupyter notebook

%matplotlib inline
已经说得很清楚了 是在Jupyter notebook做图时使用的
如果不适用这句 魔法命令 图形就会另外打开一个窗口
使用这句命令 就会让作图出现在 jupyter notebook的浏览器中