docker 内Python3的安装_docker apt-get python3

1、直接安装 apt-get install python3.6 ，失败

root@91d2d47e8aee:/# apt-get install python3.6                  
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package python3.6
E: Couldn't find any package by glob 'python3.6'
E: Couldn't find any package by regex 'python3.6'
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2、添加ppa到系统，执行

add-apt-repository ppa:jonathonf/python-3.6 
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失败，问题：add-apt-repository找不到
对于ppa的解释：https://www.cnblogs.com/EasonJim/p/7119331.html
3、执行

apt-get update
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4、执行以下

apt-get install python-software-properties  
apt-get install software-properties-common
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5、重复步骤

add-apt-repository ppa:jonathonf/python-3.6
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安装完成！！！
6、查看Python版本以及指向

ls -l /usr/bin | grep python 
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7、删除原有Python链接

rm /usr/bin/python 
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8、建立新连接

ln -s /usr/bin/python3.6 /usr/bin/python 
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9、安装pip3

apt-get install python3-pip
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