Practical solution: Solve matplotlib Chinese display problem

Practical methods to solve matplotlib Chinese display problems

Introduction:
When using matplotlib in Python to draw charts, since matplotlib uses English by default font, causing the Chinese in the chart to not display properly. This article will introduce practical methods to solve matplotlib Chinese display problems and provide specific code examples.

1. Check the fonts supported by the operating system
Before solving the Chinese display problem of matplotlib, we first need to check the fonts supported by the operating system. In Windows system, we can view it in the following way:

import matplotlib.font_manager as fm

fonts = fm.findSystemFonts()
for font in fonts:
    print(font)

This code will output all font names supported in the operating system.

2. Install Chinese fonts
If we cannot find a suitable Chinese font in the operating system, we can install some Chinese fonts. Common Chinese fonts include Song Ti, Hei Ti, Microsoft YaHei, etc. We can download the installation package of the corresponding font from the official website for installation.

3. Set the font
When solving the Chinese display problem of matplotlib, we need to tell matplotlib which font should be used to display Chinese. We can set it through the following code:

import matplotlib.pyplot as plt
import matplotlib.font_manager as fm

# 设置字体路径
font_path = '字体路径'

# 加载字体
font_prop = fm.FontProperties(fname=font_path)

# 设置字体
plt.rcParams['font.family'] = font_prop.get_name()

Among them, the 'font path' needs to be replaced according to the specific situation.

4. Test code
Next, we can write a simple code to test whether the font we set can display Chinese normally:

import matplotlib.pyplot as plt
import matplotlib.font_manager as fm
import numpy as np

# 设置字体路径
font_path = '字体路径'

# 加载字体
font_prop = fm.FontProperties(fname=font_path)

# 设置字体
plt.rcParams['font.family'] = font_prop.get_name()

# 绘制图表
x = np.arange(0, 2*np.pi, 0.1)
y = np.sin(x)

plt.plot(x, y)
plt.title('正弦函数')
plt.xlabel('角度')
plt.ylabel('幅度')
plt.show()

Before running this code, you need Replace 'font path' with the path of the Chinese font we installed.

5. Summary
Through the above method, we can solve the Chinese display problem of matplotlib. First, we need to check the fonts supported in the operating system; then, we can choose to install some Chinese fonts; finally, we need to set matplotlib to use the fonts we choose to display Chinese. By testing the code, we can verify whether the font we set can display Chinese normally.

6. Notes
When choosing Chinese fonts, we need to pay attention to the copyright issues of the fonts. In addition, different operating systems may support different fonts, so appropriate adjustments may be required in the running environment of the code.

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