Matplotlib drawing Chinese garbled code

Chinese garbled code may have the following problems , It needs to be solved one by one ：

1. You need to import Chinese fonts correctly .
2. Import fonts correctly , however matplotlib There are no Chinese fonts in the font library （ Latest version of matplotlib Chinese fonts are not installed by default ）.
3. Put Chinese fonts in matplotlib After font library , But it is not clear matplotlib cache
4. Unknown reasons

Solution
Aiming at problems 1：

modify matplotlibrc The file of , Use the following command to find matplotlibrc The location of the file :

import matplotlib
print(matplotlib.__path__) #  Output matplotlib The full path of 

Then enter matplotlib The full path of /mpl-data/ route , open matplotlibrc After the document , Open and modify as shown in the following figure :

take SimHei Fonts added font.sans-serif Inside .
Aiming at problems 2：
Get into matplotlib The full path of /mpl-data/fonts/ttf route , Will download SimHei.ttf Put the file in this folder . You can download fonts here ：https://github.com/understars0516/popular-fonts and http://xiazaiziti.com/

Aiming at problems 3：
If the problem 1,2 Can not solve the problem of Chinese garbled code , That is not clear matplotlib Font cache , Just clear it , Specific cache location , Available below ：

import matplotlib
print(matplotlib.get_cachedir())

Delete the folder , Chinese fonts can be used after re importing .
Results test ：

import numpy as np
import matplotlib
import matplotlib.pyplot as plt
matplotlib.rcParams['font.sans-serif']=['SimHei'] 
matplotlib.rcParams['axes.unicode_minus']=False 
data = np.random.rand(100)
plt.plot(data)
plt.title(' Chinese test ')
plt.xlabel('x coordinate ')
plt.ylabel('y coordinate ')
plt.show()

Aiming at problems 4：
If the above three questions have been used , Still can not be solved , You can use the following temporary methods , This method is tried and tested . I.e. direct use matplotlib Under the FontProperties Import fonts temporarily , But you need to download ttf typeface ：

from matplotlib.font_manager import FontProperties
font = FontProperties(fname=r"./SimHei.ttf", size=22)
data = np.random.rand(100)
plt.plot(data)
plt.title(' Chinese test ', fontproperties=font)
plt.xlabel('x coordinate ', fontproperties=font)
plt.ylabel('y coordinate ', fontproperties=font)
plt.show()