google colab上让 python 视觉化套件 matplotlib 显示中文

 如何在 Colab 上让 python 视觉化套件 matplotlib 显示中文 

1. 下载开源字体，目前是使用 Google 的 Noto Sans 系列
2. 讲开源字体下载后自动导入字符型文件夹
3. 在 matplotlib 设定字符参数

   # 从 Google API 上下载暂存字体放到咱村文件夹下
   !wget 'https://noto-website-2.storage.googleapis.com/pkgs/NotoSansCJKtc-hinted.zip'
   !mkdir /tmp/fonts
   !unzip -o NotoSansCJKtc-hinted.zip -d /tmp/fonts/
   !mv /tmp/fonts/NotoSansMonoCJKtc-Regular.otf /usr/share/fonts/truetype/NotoSansMonoCJKtc-Regular.otf -f
   !rm -rf /tmp/fonts
   !rm NotoSansCJKtc-hinted.zip

   --2022-06-26 08:47:46--  https://noto-website-2.storage.googleapis.com/pkgs/NotoSansCJKtc-hinted.zip
   Resolving noto-website-2.storage.googleapis.com (noto-website-2.storage.googleapis.com)... 173.194.213.128, 2607:f8b0:400c:c0a::80
   Connecting to noto-website-2.storage.googleapis.com (noto-website-2.storage.googleapis.com)|173.194.213.128|:443... connected.
   HTTP request sent, awaiting response... 200 OK
   Length: 121247366 (116M) [application/zip]
   Saving to: ‘NotoSansCJKtc-hinted.zip’
   
   NotoSansCJKtc-hinte 100%[===================>] 115.63M  39.4MB/s    in 2.9s    
   
   2022-06-26 08:47:49 (39.4 MB/s) - ‘NotoSansCJKtc-hinted.zip’ saved [121247366/121247366]
   
   Archive:  NotoSansCJKtc-hinted.zip
     inflating: /tmp/fonts/LICENSE_OFL.txt  
     inflating: /tmp/fonts/NotoSansCJKtc-Black.otf  
     inflating: /tmp/fonts/NotoSansCJKtc-Bold.otf  
     inflating: /tmp/fonts/NotoSansCJKtc-DemiLight.otf  
     inflating: /tmp/fonts/NotoSansCJKtc-Light.otf  
     inflating: /tmp/fonts/NotoSansCJKtc-Medium.otf  
     inflating: /tmp/fonts/NotoSansCJKtc-Regular.otf  
     inflating: /tmp/fonts/NotoSansCJKtc-Thin.otf  
     inflating: /tmp/fonts/NotoSansMonoCJKtc-Bold.otf  
     inflating: /tmp/fonts/NotoSansMonoCJKtc-Regular.otf  
     inflating: /tmp/fonts/README       

   # 指定字体
   import matplotlib.font_manager as font_manager
   import matplotlib.pyplot as plt
   
   font_dirs = ['/usr/share/fonts/truetype/']
   font_files = font_manager.findSystemFonts(fontpaths=font_dirs)
   
   for font_file in font_files:
     font_manager.fontManager.addfont(font_file)
   
   plt.rcParams['font.family'] = "Noto Sans Mono CJK TC"

   #测试
   import numpy as np
   import matplotlib.pyplot as plt
   
   
   plt.rcParams['axes.unicode_minus']=False #用来正常显示负号
   
   x = np.arange(1, 12)
   y = x ** 2 + 4
   plt.title("Matplotlib demo")
   plt.xlabel("时间(分钟)")
   plt.ylabel("金额($)")
   plt.plot(x,y)
   plt.show()

   

4. 显示成功