python3 pip3 安装包报错 Could not find a version that satisfies the requirement 解决方法

现象：

  
  

    
    

     
     

    
    
    
    

     
     

      
      [root@e45b79f0cd70 Python-3.9.0]
      
      # pip3 install pycryptodome
     
     
    
    

    
    

     
     

    
    
    
    

     
     

      
      Looking 
      
      in indexes: https://pypi.douban.com/simple/
     
     
    
    

    
    

     
     

    
    
    
    

     
     

      
      ERROR: Could not find a version that satisfies the requirement pycryptodome (from versions: none)
     
     
    
    

    
    

     
     

    
    
    
    

     
     

      
      ERROR: No matching distribution found 
      
      for pycryptodome
     
     
    
    

    
    

     
     

    
    
    
    

     
     

      
      [root@e45b79f0cd70 Python-3.9.0]
      
      #
     
     
    
    
  
  
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原因：pip3 镜像源问题 更换镜像源 ，当前使用的镜像源 https://pypi.douban.com/simple/ 更换为 https://pypi.mirrors.ustc.edu.cn/simple/

解决方法：

mkdir -p /$HOME/.pip/ && echo -e "[global]\nindex-url = https://pypi.mirrors.ustc.edu.cn/simple/\n" > /$HOME/.pip/pip.conf && pip3 install pycryptodome
  
  
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执行输出如下：

  
  

    
    

     
     

    
    
    
    

     
     

      
      [root@e45b79f0cd70 Python-3.9.0]
      
      # mkdir -p /$HOME/.pip/ && echo -e "[global]\nindex-url = https://pypi.mirrors.ustc.edu.cn/simple/\n" > /$HOME/.pip/pip.conf && pip3 install pycryptodome
     
     
    
    

    
    

     
     

    
    
    
    

     
     

      
      Looking 
      
      in indexes: https://pypi.mirrors.ustc.edu.cn/simple/
     
     
    
    

    
    

     
     

    
    
    
    

     
     

      
      Collecting pycryptodome
     
     
    
    

    
    

     
     

    
    
    
    

     
     

      
        Downloading https://mirrors.bfsu.edu.cn/pypi/web/packages/ad/16/9627ab0493894a11c68e46000dbcc82f578c8ff06bc2980dcd016aea9bd3/pycryptodome-3.10.1-cp35-abi3-manylinux2010_x86_64.whl (1.9 MB)
     
     
    
    

    
    

     
     

    
    
    
    

     
     

      
           |████████████████████████████████| 1.9 MB 1.4 MB/s
     
     
    
    

    
    

     
     

    
    
    
    

     
     

      
      Installing collected packages: pycryptodome
     
     
    
    

    
    

     
     

    
    
    
    

     
     

      
      Successfully installed pycryptodome-3.10.1
     
     
    
    

    
    

     
     

    
    
    
    

     
     

      
      WARNING: You are using pip version 20.2.3; however, version 21.1.1 is available.
     
     
    
    

    
    

     
     

    
    
    
    

     
     

      
      You should consider upgrading via the 
      
      '/opt/python3/bin/python3.9 -m pip install --upgrade pip' 
      
      command.
     
     
    
    

    
    

     
     

    
    
    
    

     
     

      
      [root@e45b79f0cd70 Python-3.9.0]
      
      #
     
     
    
    
  
  
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pip3 镜像源参考 ：《python3 pip 更换国内 pypi 镜像 源》https://blog.csdn.net/whatday/article/details/105431658