Solve the problem that the Chinese display of the drawing using python matplotlib under the Linux system is displayed as a box

Operating environment:

• python3.6
• ubuntu
• matplotlib under conda3
• jupyterLab

problem:

• matplotlib draws a picture, cannot display Chinese
• When no font is added, the code and figure are shown as follows:

• import matplotlib.pyplot as plt
  import random
  from matplotlib.font_manager import FontProperties
  from pylab import *
  
  
  # 每隔两小时range(2， 26， 2) ,数据在x轴的数据， 可迭代
  x = range(2, 26, 2)
  y = [15, 16, 14, 17, 20, 25, 26, 24, 22, 18, 15, 10]
  
  
  fig = plt.figure(figsize=(20, 8), dpi=80) # (20, 8)宽20，高8，dpi设置图片清晰度， 让图片更加清晰
  plt.plot(x, y)
  
  # 设置x轴, y轴的刻度
  _xticks_labels = [i/2 for i in range(2, 49)]
  plt.xticks(_xticks_labels[: :4]) # 设置步长
  plt.yticks(range(min(y), max(y)+1))
  plt.title(u'中文')
  plt.show()

   

• 

Reason (there may be other reasons):

• There are no Chinese fonts available in the linux operating system and matplotlib font library
• The matplotlib package only supports ASCII codes by default, not unicode codes

Solve the problem:

1. Find the font file library path under the matplotlib installation package under linux:

'/home/XXX/anaconda3/envs/env_keras_gpu/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf'

You can see that the font you need may not be available:

2. Download the font you need

Download path: https://github.com/dolbydu/font (GitHub)

Baidu Netdisk: Link: https://pan.baidu.com/s/1CB5gGp-A_IKJyIPFlNsMKw Extraction code: 9sef 

This is the font I downloaded by myself. If you need to download other fonts, you can go to GitHub to download

3. Put the font you downloaded in the folder

'/home/XXX/anaconda3/envs/env_keras_gpu/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf'

You can see these extra fonts Micro-group Yahei-Microsoft Yahei.ttf, Hei-SimHei.ttf, Kai-Ti-STKaiti.TTF

4. After the font is downloaded, you can add fonts

Code:

import matplotlib.pyplot as plt
import random
from matplotlib.font_manager import FontProperties

from pylab import *
fname = "/home/XXX/anaconda3/envs/env_keras_gpu/lib/python3.6/site-packages/matplotlib/mpl-data/fonts/ttf/STKaiti.TTF"
myfont = FontProperties(fname=fname)

# 每隔两小时range(2， 26， 2) ,数据在x轴的数据， 可迭代
x = range(2, 26, 2)
y = [15, 16, 14, 17, 20, 25, 26, 24, 22, 18, 15, 10]


fig = plt.figure(figsize=(20, 8), dpi=80) # (20, 8)宽20，高8，dpi设置图片清晰度， 让图片更加清晰
plt.plot(x, y)

# 设置x轴, y轴的刻度
_xticks_labels = [i/2 for i in range(2, 49)]
plt.xticks(_xticks_labels[: :4]) # 设置步长
plt.yticks(range(min(y), max(y)+1))
plt.title(u'中文',fontproperties=myfont)
plt.show()

The picture at this time is as follows:

Okay, now the problem is solved. . . .

There are other solutions, everyone can discuss and discuss

 

You can pay attention to the official account of my friend and me~~~ Here are some python technical information that my friend and I update from time to time! ! You can also leave a message to discuss technical issues. I hope you can support and pay attention to it. Thank you~~